>> The aftermath of an explosion in Saint Petersburg, Thursday. No one was hurt in the blast that happened near to these flats. The hunt for accomplices in the city's metro bombing had led authorities here earlier in the day. Inside, they found another explosive device. The security sources say is similar to an unexploded bomb found after Monday's blast.
The discovery raising the possibility that a string of bomb attacks was being planned in the city involving a group of plotters. Bomb disposal experts made the first device safe. One man living there told Reuters he saw police detain four young men in an eighth floor apartment next to his own.
Police are rushing to figure out if Akbarzhon Jalilov the suspect behind the attack acted with others. The bombing on the city's metro Monday killed 14 and injured 50. Authorities are looking into the Kyrgyzstan born Russian citizen's background and who his connections were.. The State Investigative Committee says it identified several people of Central Asian origin who had been in touch with him.