KANSAS CITY, Kan. (AP) — Authorities and rescue personnel spent part of Friday night searching for a male victim who drove a vehicle into the Kansas River.

Police said that the incident happened around 6:50 p.m. Friday at the Kaw Point Park boat ramp in Kansas City, Kansas, at the confluence of the Kansas and Missouri rivers.

Wyandotte County Sheriff’s officials say someone reported seeing a vehicle go into the river. Kansas City, Kansas, Police Chief Terry Zeigler tweeted that a witness saw a man treading water before he went under and didn’t resurface.

Rescue boats were sent out Friday night, but crews did not report finding anyone in the water.

Officials had not released any more information on the incident by midday Saturday.