griff jenkins and supplemental confirmation, as far as the police officers and the bomb officers on the scene and through griff, the information that something blew up at one point. >> again, mike, we want to make sure -- [overlapping dialogue] >> reporter: i am hearing something from a police officer now. >> while you are hearing from the police officer, we want to stress that we don't know that this is related at all to the bombing at the boston marathon that. this happened in a close mocs proximity. this started on the campus of m.i.t., 10 miles away from the finish line, where the explosions happened at the finish line of the marathon. we want to make sure that this is not confirmed that this has anything to do with the marathon bombing, but it happens to be very close to where that happened and it's a very big operation that we are seeing, bigger than something you would normally see with a robbery or just a carjacking. this is beyond what you would normally see with officers in the air, on the ground, a big presence, federal officers. i mean, you have mentioned, you know, all of those scanner traffic that you heard about the amount of fire power that these suspects had ap