Two middle eastern males just car jacked a black mercedes suv in Boston, both with guns. Tin foil hats on. It's on the 5-0 police scanner app. From 816 memorial drive in Cambridge headed towards Harvard square. Shots have been fired from the vehicle at officers. They believe its linked to the MIT deal. Dispatch is having to tell units to stay in their districts. They all want to get to Watertown to get in the fight. They have explosives and some types of grenades...they're in between houses. more shots fired. Loud explosion!, more shots fired. It's friggin nuts. They stole an SUV from state police. or someone did. Cops are calling for long guns. Explosives at the scene. Officer down. The second one. Definatly hand grenades and automatic gun fire, per the cop. Setting up a perimeter. all units retreat. cops in an ambulance, suspect wounded at gunpoint, still after another on foot. Asking for all plain clothes officers to return to the roads and do not go thru back yards. maintain perimeter. Pretty mechanized...but there's confusion. Block perimeters expanding after two bolcks to 4 away. They just asked all units to power down all cell phones. Bomb squad asking where the hell the devices are. Sending the robot towards the suspect that's wounded at gunpoint. i think. Brookline and FBI on scene. The other suspects in custody but there not sure it's him. Waiting on Id of suspect, they're not sure, and they have the SUV which has been cleared.