The state Department of Health warned people to stay out of the waters around Keehi Lagoon Park because of a sewage discharge at the drawbridge section of Sand Island Access Road.

U.S. Army officials said about 15,000 gallons of wastewater went into the water from a main under the Sand Island bridge, adjacent to the Marine Education & Training Center.

Officials say the discharge, reported at 11:30 a.m. Sunday, was stopped by crews with the Army’s Directorate of Public Works a little after 12:30 p.m.

The state Department of Health posted signs warning people to stay out of the water near the Marine Education and Training Center, the University of Hawaii Marine Center, Snug Harbor, Kapalama Basin, Mokauea Island, and the Kalihi Channel of Keehi Lagoon.

The cause of the spill is under investigation.