breaking news from russia. a massive search for the suspect or suspects who performed a massive bombing. ten are dead, dozens are injured after an explosion that tore through a subway train. they're saying it's a terrorist attack. the people trapped inside the train frantically tried to escape by prying open doors, breaking open windows. a second device was found at another station. that was disabled. our paula newton joins us now from st. petersburg with more. paul, what are investigators saying right now about who could be behind the attack and any connection to president putin being in that area? >> reporter: yeah, at least one lawmaker said, could it really be a coincidence, this is vladimir putin's hometown? he was here doing a political summit. as the hours go by, no