LOS ANGELES -  

Officials from a variety of law-enforcement agencies announced the formation of a task force to enhance the investigation and search for triple-murder suspect Christopher Dorner, authorities said Saturday.

The Irvine Police Department, Riverside Police Department, FBI, U.S. Marshals Service, Los Angeles Police Department and some allied organizations will join the pursuit of Dorner.

Dorner is a fired Los Angeles police officer suspected of shooting to death the 28-year-old daughter of an ex-LAPD captain who unsuccessfully represented Dorner in an appeal of his 2008 termination and her 27-year-old fiancé last Sunday.

He also is accused of killing a Riverside police officer and wounding another early Thursday in an armed ambush of their car as it was stopped at a traffic light, about 20 minutes after he wounded an LAPD officer in a Corona shootout.

"The Dorner Task Force has combined investigative resources that will lead to the capture of Christopher Dorner," LAPD Officer Rosario Herrera said.

Herrera urged anyone with information about Dorner to call (213) 486-6860.