Chief Constable Mark Rowley said he could not comment while the Met Police phone-hacking investigation continues.

BBC: Surrey Police Chief Constable Mark Rowley

Assistant Metropolitan Police Commissioner Mark Rowley said 28% of those arrested in London, about 1, 500 people a week, are foreign nationals.

BBC: Mark Rowley

Searches have been carried out at several locations in connection with the slaying, Assistant Commissioner for Specialist Crime and Operations Mark Rowley said.

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An additional 1, 200 police are now on London's streets to reassure the public, Assistant Commissioner for Specialist Crime and Operations Mark Rowley said, with extra patrols at key locations such as religious institutions and transport hubs.

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Mark Rowley, an assistant commissioner at London's Metropolitan Police, whose counterterrorism unit is leading the investigation, said police raised its presence in Woolwich and the surrounding areas, with some 1, 200 extra officers were on duty across London.

WSJ: Police Arrest Two New Suspects in U.K. Killing