One of the suspects believed to be responsible for bombings at the Boston Marathon has been shot dead by the police. He was killed by police after a car chase in Watertown, but the other man managed to escape. Both suspects led officers on a wild and deadly chase through suburban neighborhoods early on Friday that ended in the death of one of them and a MIT campus police officer.

The two men carjacked a driver at gunpoint and drove away with the driver still in the car. They released the man unharmed. Police chased the suspects, who threw bombs and exchanged gunfire, seriously wounding one officer. In Watertown, officers and the men were involved in a gun-battle lasting 10 minutes, according to witnesses. Video footage emerged showed a fully-clothed suspect lying on the floor, surrounded by police. More video was shown by US media of a suspect being led into a police car after being stripped of his clothes. But it is not clear who the men were, or what happened after their apparent arrest.

The incident happened amidst heavily armed police searching the US town house-by-house for the suspect in Monday’s Boston Marathon bombing. Residents of Watertown, near Boston, have been warned to stay in their homes, public transport in the area has been halted and shops are closed.

Earlier, the FBI has released several images of two men they were hunting in relation to the bombing. One was wearing a white cap, the other had a black cap. Police said “suspect number one” had been killed, and they were looking for “suspect number two”, the “white-capped individual. Three people died and more than 170 wounded when two bombs exploded near the finish line of Monday’s marathon.