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The Lone Star College North Harris campus is seen in this undated satellite image courtesy of Google Earth. A person with a gun was on the campus of Lone Star College near Houston, Texas, but it was unclear if anyone had been shot, a spokesman for the school said Tuesday. REUTERS/Google Earth/Handout

Police and emergency personnel evacuate an injured male on a stretcher outside a building on the Lone Star College Campus near Houston, Texas in this still image taken from video courtesy of KPRC-TV Houston January 22, 2013. Multiple people have been shot according to news reports. REUTERS/KPRC-TV Houston/Handout

Police and emergency personnel evacuate an injured male on a stretcher outside a building on the Lone Star College Campus near Houston, Texas in this still image taken from video courtesy of KPRC-TV Houston January 22, 2013. Multiple people have been shot according to news reports. REUTERS/KPRC-TV Houston/Handout

Police and emergency personnel vehicles line the road outside a building on the Lone Star College Campus near Houston, Texas in this still image taken from video courtesy of KPRC-TV Houston January 22, 2013. Multiple people have been shot according to news reports. REUTERS/KPRC-TV Houston/Handout

Tactical response officers run into a building on the Lone Star College Campus near Houston, Texas in this still image taken from video courtesy of KPRC-TV Houston January 22, 2013. Multiple people have been shot according to news reports. REUTERS/KPRC-TV Houston/Handout

People run from a building on the Lone Star College Campus near Houston, Texas in this still image taken from video courtesy of KPRC-TV Houston January 22, 2013. Multiple people have been shot according to news reports. REUTERS/KPRC-TV Houston/Handout

This frame grab provided by KPRC Houston shows the scene at Lone Star College Tuesday, Jan. 22, 2013 as police and emergency personnel work. A shooting at the Texas community college campus wounded at least two people Tuesday and sent students fleeing for safety officials said. (AP Photo/Courtesy KPRC TV)

Sheriff Deputies and Houston Police stand on the street to the Lone Star College North Harris campus in Houston, Texas January 22, 2013. A shooting broke out between two people on the campus on Tuesday and there were three injuries, including one of the shooters, police and a school spokesman said. REUTERS/Richard Carson

Students talk on cell phones and wait after evacuating on foot from the Lone Star College North Harris campus in Houston, Texas, January 22, 2013. A shooting broke out between two people on the campus on Tuesday and there were three injuries, including one of the shooters, police and a school spokesman said. REUTERS/Richard Carson

Students evacuate on foot at the Lone Star College North Harris campus in Houston, Texas, January 22, 2013. A shooting broke out between two people on the campus on Tuesday and there were three injuries, including one of the shooters, police and a school spokesman said. REUTERS/Richard Carson

Students evacuate on foot with a Sheriff's Deputy alongside at the Lone Star College North Harris campus in Houston, Texas, January 22, 2013. A shooting broke out between two people on the campus on Tuesday and there were three injuries, including one of the shooters, police and a school spokesman said. REUTERS/Richard Carson

A mother joins her son as he evacuates on foot from the Lone Star College North Harris campus in Houston, Texas, January 22, 2013. A shooting broke out between two people on the campus on Tuesday and there were three injuries, including one of the shooters, police and a school spokesman said. REUTERS/Richard Carson

A Harris Precinct 4 Constable blocks off an entrance to the Lone Star College North Harris campus after a shooting on Tuesday, Jan. 22, 2013 in Houston. The shooting on campus wounded three people and sent students fleeing for safety as officials placed the campus on lockdown, officials said. Harris County Sheriff's Maj. Armando Tello said authorities had detained a person of interest. Police did not provide any details about the people who were wounded. (AP Photo/Patric Schneider)

A sheriff's deputy stands guard at the entrance to Lone Star College North Harris campus in Houston, Texas, January 22, 2013. Shooting broke out between two people on the campus of Lone Star College near Houston on Tuesday and three people were injured, including one of the shooters, police said. REUTERS/Richard Carson

Students wait outside an entrance to the Lone Star College North Harris campus after a shooting on campus on Tuesday, Jan. 22, 2013 in Houston. The shooting wounded three people and sent students fleeing for safety as officials placed the campus on lockdown, officials said. Harris County Sheriff's Maj. Armando Tello said authorities had detained a person of interest. Police did not provide any details about the people who were wounded. (AP Photo/Patric Schneider)

Tierna Tate carries her 19th month old daughter Olivia Tate after she picked her up from the Lone Star College Daycare on January 22, 2013 in The Woodlands, Texas. According to reports, three people were injured during a shooting on the courtyard between the Library and cafeteria. (Photo by Thomas B. Shea/Getty Images)

Buses wait to pick up children from area elementary schools after a shooting occurred at Lone Star College Campus on January 22, 2013 in The Woodlands, Texas. According to reports, three people were injured during a shooting on the courtyard between the Library and cafeteria. (Photo by Thomas B. Shea/Getty Images)

Harris County Capt. Ken Melancon address the media at Lone Star College-North Harris Campus following a shooting on campus on Tuesday, Jan. 22, 2013. (AP Photo/The Courier, Jason Fochtman)

Major Armando Tello, with the Harris County Sheriff's Office, address the media along side Lone Star College Chancellor Richard Carpenter, left, at Lone Star College-North Harris Campus following a shooting on campus on Tuesday, Jan. 22, 2013. (AP Photo/The Courier, Jason Fochtman)

Harris County Sheriff Officers work the scene at Lone Star Campus after a shooting occurred on January 22, 2013 in The Woodlands, Texas. According to reports, three people were injured during a shooting on the courtyard between the Library and cafeteria. (Photo by Thomas B. Shea/Getty Images)

Lone Star College Freshman Sheketa Taylor hugs her father Judson Gimblin after they found each other on the Lone Star Campus on January 22, 2013 in The Woodlands, Texas. According to reports, three people were injured during a shooting on the courtyard between the Library and cafeteria. (Photo by Thomas B. Shea/Getty Images)

A heavily armed policeman walks along at the Lone Star College North Harris campus Tuesday Jan. 22, 2013 in Houston. A shooting at the Texas community college wounded three people Tuesday and sent some students fleeing for safety while others with medical training helped tend the wounded. (AP Photo/ Patric Schneider)

Lone Star College students sit on the street corner after they were evacuated from the campus following a shooting at the north Harris County school Tuesday, Jan. 22, 2013, in Houston. The shooting wounded three people and sent students fleeing for safety as officials placed the campus on lockdown, officials said. (AP Photo/Houston Chronicle, Brett Coomer)

Ana Leal, left, embraces Lone Star College student Sabrina Cuellar after she was evacuated and picked up by her mother, Maria Cuellar, right, from the campus following a shooting at the north Harris County school Tuesday, Jan. 22, 2013, in Houston. Authorities say the shooting was the result of an altercation between two people, and at least one was a student. (AP Photo/Houston Chronicle, Brett Coomer)

A woman, right, embraces a Lone Star College student after he was evacuated from the campus following a shooting at the north Harris County school Tuesday, Jan. 22, 2013, in Houston. The shooting wounded three people Tuesday and sent students fleeing for safety as officials placed the campus on lockdown, officials said. (AP Photo/Houston Chronicle, Brett Coomer)

Police collect evidence after a shooting happened on Lone Star College North Harris campus on Tuesday January 22, in Houston. The shooting at a community college wounded three people Tuesday and sent some students fleeing for safety while others with medical training helped tend the wounded. (AP Photo/ Patric Schneider)

Police collect evidence after a shooting happened on Lone Star College North Harris campus on Tuesday January 22, in Houston. The shooting at a community college wounded three people Tuesday and sent some students fleeing for safety while others with medical training helped tend the wounded. (AP Photo/ Patric Schneider)

Harris County Sheriff Officers work the scene at Lone Star Campus after a shooting occurred on January 22, 2013 in The Woodlands, Texas. According to reports, three people were injured during a shooting on the courtyard between the Library and cafeteria. (Photo by Thomas B. Shea/Getty Images)

An exterior view of the library at Lone Star Campus after a shooting occurred on January 22, 2013 in The Woodlands, Texas. According to reports, three people were injured during a shooting on the courtyard between the Library and cafeteria. (Photo by Thomas B. Shea/Getty Images)