The search for Christopher Jordan Dorner-the ex-cop wanted for a series of recent L.A. shootings that killed three and injured two police officers--has extended statewide into Nevada.

A statewide "high alert" on the ex-cop's behalf was sent out across Nevada at 8:30 a.m. on Thursday, authorities with the Nevada Highway Patrol said.

The former Los Angeles police officer, whose last known address is in La Palma, California, is suspected of opening fire on four police officers early Thursday morning, killing one and critically injuring another.

Arizona officials are aware of the manhunt for Dorner, yet have not issued any formal alerts Carrick Cook from the state's Department of Public Safety told the L.A. Times.

Dorner was fired from the LAPD in 2008 for making false statements. The couple killed over the weekend is Monica Quan and Keith Lawrence. Quan is the daughter of the former police captain that had represented Dorner in the disciplinary hearings that led to his termination from the police force. Lawrence was her fiancé.

"He knows what he's doing," L.A. Police Chief Charlie Beck said about Dorner at a press conference on Thursday, according to CBS. "We trained him. He was also a member of the armed forces. It is extremely worrisome and scary, especially for the police officers involved."

Former head of the LAPD's Major Crimes Division John Miller, said on "CBS This Morning" Thursday that local police were engaged in a manhunt "like none other" to find the suspected shooter.

"He's really thrown down an incredible gauntlet here, and they have deployed every resource the LAPD has," Miller said.

The rogue ex-cop's LAPD badge and ID, found near a San Diego airport, were turned into police on Thursday, according to San Diego police Sgt. Ray Battrick.

Dorner allegedly tried to steal a boat in San Diego on Wednesday, but failed and fled.

"We're asking our officers to be extraordinarily cautious just as we're asking the public to be extraordinarily cautious with this guy," said LAPD Cmdr. Andrew Smith. "He's already demonstrated he has a propensity for shooting innocent people. We can't provide a lot of information now because we're trying to capture him."