CHICAGO (CBS) — A Chicago police sport-utility vehicle slammed into a tree after chasing a four-wheeler through Garfield Park Wednesday night.

Officers were responding to a call of shots fired just before 8 p.m. in the 100 block of North Homan Boulevard, along the eastern edge of the park, when they spotted a man driving an off-road vehicle through the park.

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Police chased the man, believing he might have been the one with the gun, but witnesses disputed that.

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“They couldn’t catch him, so they obviously didn’t see the tree, so that’s pretty much what it was. They didn’t see it, so they hit it. It could have been a child. Thank God that it wasn’t,” one woman said.

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Both officers in the vehicle were taken to an area hospital. Their conditions were reported as stable.