Three officers were shot — two in Riverside, one in Corona — during the search early Thursday for a former Los Angeles Police Department officer wanted in connection with a double slaying in Irvine.

Police said two Riverside officers responded to Magnolia and Arlington after receiving a call for assistance. The response occurred during the search that began with a report of a vehicle matching the description of ex-LAPD Officer Christopher Dorner.

Both Riverside officers were shot and transported to a hospital, where one was pronounced dead. The second officer remained in surgery, police said.

Dorner is wanted in connection with the double slaying of a newly engaged couple last weekend, Irvine Police Chief David Maggard said Wednesday evening. Maggard said that Dorner implicated himself in a “multi-page manifesto” that was published online but has since been taken down. A source inside LAPD gave NBCLosAngeles.com the manifesto, which is about 11,300 words long and appears to lay out a plan for targeting those involved in his firing.

In the manifesto — addressed to “America” and titled “Last Resort” — Dorner writes that the “horrendous murders” are “a necessary evil.”

More from Jonathan Lloyd@ NBCLosAngeles.com

Posted by Libergirl