UPDATE: Possible drowning at Palisades-Kepler State Park

LINN COUNTY, Iowa (KCRG) - Search crews are back out at Palisades-Kepler State Park, looking for a missing 31-year-old man.

The Linn County Sheriff’s Office is investigating a possible drowning at Palisades-Kepler State Park. (MGN)

Members of the Linn County Sheriff's Office and Iowa DNR are working through the Cedar River to look for Jairo Jimenez.

Investigators said Jimenez went missing Saturday night. He went underwater at 7:30 p.m. and no one saw him resurface.

Emergency crews have used boats to search the area.