OMAHA, Neb. (AP) — Authorities are expected to resume their search of the Missouri River Friday for a teenager who went under while swimming on the north end of Omaha

Rescuers were called to the scene north of Omaha’s N.P. Dodge Park around 7 p.m. Thursday. A helicopter, boats and a dive team were deployed without success before darkness.

Family members say the 17-year-old was on a sandbar before going into the river. They say he went under the water and didn’t resurface.