(AP) — Indiana conservation officers say authorities are searching the waters of Lake Michigan for a missing teenager.

They say witnesses saw 17-year-old Rahem Mason of South Bend go underwater Saturday evening near Washington Park in Michigan City and didn’t see him resurface.

Officers say Michigan City firefighters began to manually search the waters, but high waves and currents prevented a search by scuba divers. A U.S. Coast Guard vessel searched the area by boat and a Coast Guard helicopter conducted an air search.

Search efforts resumed Sunday morning. The incident occurred after normal swimming hours and the water had been closed throughout the day due to dangerous waves and currents.