CHICAGO (CBS) — A man’s body was pulled from the North Branch of the Chicago River Thursday morning.

A resident of the Avondale neighborhood was walking his dog near Roscoe Street and California Avenue around 7 a.m. Thursday, when he saw what appeared to be a body in the water, police said.

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The man picked up his cell phone and called 911, and police and fire crews came to the scene.

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Police Marine Unit officers and Fire Department rescuers pulled the body from the water, which was believed to be that of a man in his early 40s.

The Cook County Medical Examiner’s office did not immediately have additional details.

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The Sun-Times Media Wire contributed to this report.