devices found. more than 150 people injured yesterday in the blast. some gravely. >> any information you have, videos or photographs that happened, not just at that scene but anywhere in the immediate vicinity could be helpful to this investigation. >> bad day for boston, but i think if we pull together, we'll get through it. we're a strong city. boston will overcome. >> we learned that the saudi national that was tackled is cleared as a possible suspect. >> this was a heinous and cowardly act and given what we now know what took place the fbi is investigating it as an act of terrorism. >> we believe at this hour that the bomber is still on the loose but learning about new clues found at the terror scene. remanence of pressure cookers