Los Angeles Mayor Antonio Villaraigosa on Sunday announced a $1 million reward for information leading to the capture of a fugitive ex-cop suspected of three murders.
"We will not tolerate anyone undermining the security, the tranquility of our neighborhoods and our communities," Villaraigosa said at a news conference announcing the reward.
"We will not tolerate this reign of terror that has robbed us of the peace of mind that residents of southern California deserve. We will not tolerate this murderer remaining at large," he said.
The mayor said local leaders, businesses, unions, law enforcement and community groups had pooled resources to raise the reward money.
Police have been hunting the snow-blanketed California mountains for Christopher Dorner, 33, a disgruntled former LA Police Department (LAPD) officer who had threatened to murder police in a chilling online manifesto.
More than 100 police searched earlier for Dorner after his car was found in a nearby area, reportedly with weapons and a broken axle.
The search has focused on cabins above the ski resort of Big Bear, two hours east of Los Angeles, where Dorner's burnt-out pickup truck was found in nearby woods.
Dorner, a naval reservist, is suspected of killing a couple on February 3 then ambushing two policemen early Thursday, killing one. He also injured another officer in a separate incident.
In an Internet manifesto threatening police and their families, Dorner pledged to "bring unconventional and asymmetrical warfare to those in LAPD uniform whether on or off duty."
The LAPD, backed by agencies including the Federal Bureau of Investigation (FBI), is protecting over 40 possible targets, some of them identified in Dorner's rambling online manifesto.