A body was discovered in the river below the Seventh Street Bridge in Modesto early Thursday evening.
Authorities received a call at 5:30 p.m. on a report of the discovery.
When they arrived, they found a body that had been in the water for "quite some time," according to Battalion Chief Hugo Patino of the Modesto Regional Fire Authority.
The Stanislaus County Coroner's Office was called to the scene.
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Police were attempting to recover the body and needed assistance from the fire department to negotiate a steep area near the river.