As it happened: Manhunt for Boston bomb suspect

Key Points

• Boston police have detained Dzhokhar Tsarnaev, the surviving suspect in the Marathon bombing, after an operation in the suburb of Watertown.
• His brother Tamerlan Tsarnaev, 26, also a suspect, was killed in a shootout with police near Watertown on Thursday night.
• The search began after the fatal shooting of a police officer at the Massachusetts Institute of Technology (MIT) in Cambridge.
• The governor of Massachusetts has relaxed his order for people to stay indoors in the Boston area and has announced the reopening of the subway system. He urged continued vigilance.
• All times BST.