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Police chase Boston bomb suspect Police chase Boston bomb suspect
(35 minutes later)
US police are hunting a suspect in Monday's deadly Boston Marathon bombing in a small town near the city. US police are hunting a suspect in Monday's deadly Boston Marathon bombing, after another suspect was killed in a car chase and shoot-out.
A huge police operation started after an officer was shot dead on a university campus. Police began the manhunt on Thursday after an officer was killed at a university campus.
One suspect was killed during a car-chase and shoot-out in Watertown, six miles (10km) from Boston. Two suspects stole a car and threw bombs and traded gunfire police chasing them. An officer was wounded.
Another suspect, shown in images from the Boston Marathon wearing a white baseball cap, was on the run in Watertown. Three people were killed and more than 170 wounded when two bombs exploded near the finish line of the marathon.
Police said in a statement the two men were suspected of killing a police officer on campus at the Massachusetts Institute of Technology (MIT) late on Thursday. The authorities tracked the two suspects to Watertown, west of Boston, where one was killed and another escaped.
Police later confirmed that the two men they were chasing were suspects in Monday's marathon bombing.
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".
The authorities in Massachusetts Bay have suspended the transport system and no vehicles are being allowed in or out of the Watertown area.
Officials have told people in the area to stay at home, and warned businesses not to open.
Blast wounds
An earlier police statement said the two men were suspected of killing a police officer on campus at the Massachusetts Institute of Technology (MIT) late on Thursday.
They then stole a car at gunpoint and drove away with the car's owner still on board.They then stole a car at gunpoint and drove away with the car's owner still on board.
They later released the driver unharmed. They released the driver unharmed.
The men threw bombs and traded gunfire with police before being stopped at Watertown. After a car chase, witnesses in Watertown heard several explosions and a gun-battle lasting 10 minutes.
Witnesses heard several explosions and a gun-battle lasting 10 minutes.
Video footage emerged of a suspect lying on the floor, and later being led into a police car after being stripped of his clothes.Video footage emerged of a suspect lying on the floor, and later being led into a police car after being stripped of his clothes.
Police later said one suspect had been hit by bullets during the chase and later died. Officials later said one suspect had been hit by bullets during the chase and died.
It was unclear whether the arrested man was the suspect who had died. Dr Richard Wolfe, of the Beth Israel Deaconess Medical Center, said the suspect was brought in with multiple blast and gunshot wounds to his upper body.
He was in cardiac arrest when he arrived at hospital and despite attempts to resuscitate him, he was pronounced dead at 01:35 (05:35 GMT), Dr Wolfe said.
It was unclear whether the arrested man on the video footage was the suspect who had died.
Police also confirmed that an officer had been critically wounded in the chase.Police also confirmed that an officer had been critically wounded in the chase.
Police later said they were looking for "suspect number two", the "white-capped individual".
The FBI has released several images of two men they were hunting in relation to Monday's marathon bombing.
One was wearing a white cap, the other had a black cap.
Boston police Commissioner Ed Davis said he believed the man being hunted in Watertown was a "terrorist".Boston police Commissioner Ed Davis said he believed the man being hunted in Watertown was a "terrorist".
"We believe this to be a man who came here to kill people," he said."We believe this to be a man who came here to kill people," he said.
Three people were killed and more than 170 wounded when the two bombs exploded near the finish line of the Boston Marathon.Three people were killed and more than 170 wounded when the two bombs exploded near the finish line of the Boston Marathon.
The blasts killed Martin Richard, aged eight, Krystle Campbell, 29, and Lu Lingzi, 23, a postgraduate student from China.The blasts killed Martin Richard, aged eight, Krystle Campbell, 29, and Lu Lingzi, 23, a postgraduate student from China.
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