Two San Diego police officers are shot, one fatally, on July 29, 2016. [Photo: huanqiu.com]

San Diego Police chief Shelley Zimmerman has announced they have arrested the suspects who killed one police officer and wounded another.

"We are here to announce the arrest of Jesse Michael Gomez, date of birth 12/19/63, for the murder of our San Diego Police Officer Jonathan DeGuzman and the attempt murder of Officer Wade Irwin. We surrounded a house earlier today in the 4000 block of Epsilon Street. During that operation, Marcus Antonio Cassani, date of birth 6/8/75, was located and arrested for an outstanding warrant."

Gomez is charged with murder. Whether Cassani was connected with the shooting is still under investigation.

The precise circumstances of the shooting remain unclear.

Police departments across the United States have been on high alert in the wake of fatal ambushes in Dallas, Texas, and Baton Rouge, Louisiana, earlier this month, which left a total of eight police officers dead.