File photo of beach closure notice from 2014.

Long Beach health officials are ordering the seven miles of public beach in the city temporarily closed after approximately 764,000 gallons of sewage was spilled into the Los Angeles River on Thursday.

The spill happened at the intersection of Hollydale and Silverlake boulevards, about 30 miles upstream. Officials are still investigating and do not yet know the cause of the spill.

Long Beach officials were notified of the spill today by county officials and began monitoring the water quality. Long Beach City Health Officer Anissa Davis ordered all swimming areas along the coastal beaches temporarily closed until water quality meets state standards.

You can call the water hotline at 562-570-4199 for the latest status of beach water quality or visit the city’s website.

Valerie Osier is the Social Media & Newsletter Manager for the Long Beach Post. Reach her at [email protected] or on Twitter @ValerieOsier