Four people have been arrested in connection with the July 7 London bombings that killed 52 people in 2005. Police say two men and two women have been detained. It is reported one of them is the widow of one of the suicide bombers. However, police are releasing little information about their latest operation. Last month the first people to be charged in connection with the bombings went on trial. The trio were remanded in custody until June.
British police arrest group over July 7 bombings