SAN DIEGO — One police officer died and another was wounded after being shot in a San Diego neighborhood, authorities said early Friday.

It is with a very sad heart that we announce the death of one of our Officers tonight. Pray for his family pic.twitter.com/3l9PXa1vuW

— San Diego Police (@SanDiegoPD) July 29, 2016

Police Chief Shelley Zimmerman said in a Twitter post that she had left the hospital where the injured officer had come out of surgery and that he’s expected to survive.

The names of the officers have not been released.

There was no immediate word on what touched off the violence, which occurred around 11 p.m. PDT Thursday in the southeastern part of town.

Police searched the area for suspects and urged residents to stay indoors.

Video footage showed officers out in force with numerous squad cars with emergency lights flashing lining a street, officers on foot, and a helicopter buzz overhead.

Police spokesmen did not immediately return calls for further comment, but the department said in a Twitter posting that one suspect was in custody and other possible suspects were being sought.

The shooting comes with law officers around the country on alert following the killing of officers in Dallas and Baton Rouge, Louisiana, this month.