BALTIMORE (CBS SF) — Angry crowds rioted in Baltimore, throwing rocks and bricks at police officers and looting stores hours after thousands attended the funeral of a man who died after being severely injured in police custody.

At least seven officers have been hurt, and at least one was described by a police captain as ‘unresponsive.’

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The rioting began after the funeral for Freddie Gray, who suffered a severe spinal injury and died a week after his arrest. Rioters were spread out across several parts of the city, damaging police patrol cars and setting other vehicles on fire.

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Police said while the funeral was underway, the department had received a “credible threat” that rival gangs were working together to “take out” law enforcement officers.

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Complete Coverage on CBS Baltimore