Arrest Made In London Explosions Investigation

London police announced an arrest in their investigation of last Thursday's bombings. The man arrested was one of four men police focused on from West Yorkshire. Police said the four men were seen on close-circuit TV the morning of the bombings, arriving by train at King's Cross Station.

The head of the London police anti-terrorist section revealed personal documents bearing the names of three of the four men near the train seats where the bombs exploded. Another of the men is believed to have died in the bombings.

Police continue to receive calls into the anti-terrorist hotline and are investigating the tips.

52 people are confirmed dead from the bombings which targeted London's subway system and a double-decker bus.