Police recover four bombs

LONDON, Friday (AFP) - Police in London have recovered four "viable" rucksack-carried bombs following Thursday's apparently failed attacks on public transport, according to a report here.

The devices, all contained in rucksacks, were recovered from three London Underground subway trains and a bus, Britain's domestic Press Association news agency said, without citing its sources.

Three of the four devices were thought to be of a similar size and weight as the bombs used in the July 7 attacks in the capital in which at least 56 people died, while the fourth was smaller, the report said.

Police believe at least four bombers - thought to have been would-be suicide attackers - were involved and were understood to be still at large, it added.

Terrorism experts believe the attackers might have been intending similar carnage but that their bombs failed to go off properly.

London's Metropolitan Police said it could not comment on the report.

"That information has not come from the police. We have no comment on anything recovered from the scenes," a spokesman said.