WATCH: Police engage in a long gun battle in Watertown, Mass. [Updated]
The Boston Globe reports that the firefight ended with one Boston Marathon suspect wounded and in custody. He was pronounced dead on arrival at the hospital

One suspect in the Boston Marathon bombing is in custody, wounded, and another is on the loose in Watertown, Mass., according to The Boston Globe. The events in Watertown started with the fatal shooting of an MIT police officer in Cambridge, a carjacking followed by a car chase into Watertown (about 4 miles away), then a huge firefight in which the suspects reportedly lobbed explosives at police. This amateur video of the firefight in Watertown was uploaded to YouTube.
Reuters is providing live updates.
UPDATE (4:30 ET): Police say the "dark hat" suspect was pronounced dead on arrival at the hospital. This is Boston Police Commissioner Edward Davis:
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Here's context for the video above, from CBS News:
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