Ten from Algeria held in Britain under anti-terrorism laws.

LONDON (AFP) - Ten men, believed to be Algerians, were being held under Britain’s anti-terrorism laws following dawn raids in London and Manchester, a Metropolitan Police spokeswoman told AFP.

Six of the men were arrested at residences in north, east and southeast London, while the others were taken into custody in northwestern Manchester, she said Tuesday.

“The operations are part of ongoing and extensive inquiries by the Anti-Terrorist Branch into alleged terrorist activities,” she said. “Searches are currently being carried out at all residential premises.”

The men were identified only by letters A through J, with four of those in London, and one in Manchester, described as being in their 30s. No ages were available for the others.