LONG BEACH, CA – The City of Long Beach has closed all swimming areas off its coastal beaches due to a sewage spill, it was announced Friday.

According to the city, about 764,000 gallons of sewage spilled into the Los Angeles River for unknown reasons on Thursday in the area of Hollydale Drive and Silver Lake Boulevard.

As a result, the ocean waters off the city's roughly seven miles of beaches will remain closed until testing shows bacteria levels are within acceptable levels.