Photos: Attack in London could be terrorist related

Police officers man a cordoned off area in Woolwich, east London, on May 22, 2013, following an incident in which a man was killed and two others seriously injured. A man thought to be a serving soldier has been killed near a barracks in London, while two alleged suspects are in a serious condition in hospital after police responded to reports of an incident, the local lawmaker said. The incident took place in a street near the Royal Artillery Barracks in Woolwich. AFP PHOTO/Leon NealLEON NEAL/AFP/Getty Images ( 519969358 )

Police officers cordon off a road area in Woolwich, east London, on May 22, 2013, following an incident in which one man was killed and two others seriously injured. British police shot and wounded two men after a man thought to be a serving soldier was killed outside a London barracks, in an attack Prime Minister David Cameron called "truly shocking". AFP PHOTO / CARL COURT/AFP/Getty Images ( 519972760 )

A police forensics officer investigates a crime scene where one man was killed in Woolwich, southeast London May 22, 2013. REUTERS/Stefan Wermuth ( BRITAIN-KILLING/ )

Police forensics officers search a cordoned off area in Woolwich, east London, on May 22, 2013, following an incident in which one man was killed and two others seriously injured. AFP PHOTO / CARL COURT/AFP/Getty Images ( 519972540 )

British forensic officers attend the scene of an apparent attack which has left one man confirmed dead and two people wounded near Woolwich barracks in London Wednesday, May, 22, 2013. (AP Photo/Alastair Grant) ( Britain Attack )

Police talk to local residents near to the scene in Woolwich, following a major incident in which a man was killed, on May 22, 2013 in London, England. (Photo by Dan Kitwood/Getty Images) ( 169252145 )

Scenes of Crime Officers at the scene in Woolwich following a major incident in which a man was killed, on May 22, 2013 in London, England. (Photo by Dan Kitwood/Getty Images) ( 169253899 )

Scenes of Crime Officers at the scene in Woolwich following a major incident in which a man was killed, on May 22, 2013 in London, England. (Photo by Dan Kitwood/Getty Images) ( 169253904 )

Scenes of Crime Officers at the scene in Woolwich following a major incident in which a man was killed, on May 22, 2013 in London, England. (Photo by Dan Kitwood/Getty Images) ( 169253909 )

Scenes of Crime Officers at the scene in Woolwich following a major incident in which a man was killed, on May 22, 2013 in London, England. (Photo by Dan Kitwood/Getty Images) ( 169254066 )

Police tape marks a cordon set up around a crime scene where one man was killed in Woolwich, southeast London May 22, 2013. REUTERS/Stefan Wermuth ( BRITAIN-KILLING/ )

Police officers carry equipment while investigating a crime scene where one man was killed in Woolwich, southeast London May 22, 2013. REUTERS/Stefan Wermuth ( BRITAIN-KILLING/ )

Police forensics officers investigate a car at a crime scene where one man was killed in Woolwich, southeast London May 22, 2013. REUTERS/Stefan Wermuth ( BRITAIN-KILLING/ )

Police forensics officers investigate a crime scene where one man was killed in Woolwich, southeast London May 22, 2013. REUTERS/Stefan Wermuth ( BRITAIN-KILLING/ )

Police forensics tents and officers are seen in Woolwich, east London, on May 22, 2013. AFP PHOTO/Leon NEAL/AFP/Getty Images ( 519972125 )

Police forensics tents and officers are seen in Woolwich, east London, on May 22, 2013. AFP PHOTO/Leon NEAL/AFP/Getty Images ( 519972147 )

Police forensics officers search a cordoned off area in Woolwich, east London, on May 22, 2013, following an incident in which one man was killed and two others seriously injured. AFP PHOTO / CARL COURT/AFP/Getty Images ( 519972542 )

Police forensics officers search a cordoned off area in Woolwich, east London, on May 22, 2013, following an incident in which one man was killed and two others seriously injured. AFP PHOTO / CARL COURT/AFP/Getty Images ( 519972570 )

Police forensics officers search a cordoned off area in Woolwich, east London, on May 22, 2013, following an incident in which one man was killed and two others seriously injured. AFP PHOTO / CARL COURT/AFP/Getty Images ( 519972592 )

A police forensics officer takes photographs inside a cordoned off area in Woolwich, east London, on May 22, 2013, following an incident in which one man was killed and two others seriously injured. AFP PHOTO / CARL COURT/AFP/Getty Images ( 519972649 )

Police officers cordon off a road area in Woolwich, east London, on May 22, 2013, following an incident in which one man was killed and two others seriously injured. AFP PHOTO / CARL COURT/AFP/Getty Images ( 519972797 )

Police officers cordon off a road area in Woolwich, east London, on May 22, 2013, following an incident in which one man was killed and two others seriously injured. AFP PHOTO / CARL COURT/AFP/Getty Images ( 519972807 )

Police forensics tents and officers are seen in Woolwich, east London, on May 22, 2013. AFP PHOTO/Leon NEAL/AFP/Getty Images ( 519972112 )

Police forensics officers search a cordoned off area in Woolwich, east London, on May 22, 2013, following an incident in which one man was killed and two others seriously injured. AFP PHOTO / CARL COURT/AFP/Getty Images ( 519972590 )

A police forensics officer takes photographs inside a cordoned off area in Woolwich, east London, on May 22, 2013, following an incident in which one man was killed and two others seruiously injured. British police shot and wounded two men after a man thought to be a serving soldier was killed outside a London barracks, in an attack Prime Minister David Cameron called "truly shocking". In a dramatic move, the government's emergency response committee was being summoned following the killing which some eyewitness reports suggested was an attempted beheading using machete-like knives. AFP PHOTO / CARL COURTCARL COURT/AFP/Getty Images ( 519972631 )