The number of tips has exploded since a reward of more than $1 million was offered this week for information leading to Dorner's capture.
"Some are credible, and all of them will be looked at," LAPD Lt. Andy Neiman said of the tips.
Asked about media reports that Dorner was spotted buying diving equipment at a Torrance store days before the killing began, Neiman said investigators have not confirmed whether the man seen at the store was Dorner.
Police also are looking into reports that Dorner stayed at a Manhattan Beach motel after killing a young couple in Irvine on Feb. 3 and that he might have fled to Mexico. But they have not confirmed any of those tips.
The investigation is going in "many different directions," Neiman said.
Dorner, a former Los Angeles police officer who was fired in 2009, is suspected of killing three people this month, including a Riverside police officer. And in an online posting, he threatened to kill other police officers and their families. He wrote that the killing would stop only when his name was publicly cleared by the LAPD.
Police were still searching today near Big Bear Lake in San Bernardino County today, where Dorner's burning truck was found Thursday.
Neiman said authorities will continue searching that area until all leads are exhausted.
Fifty LAPD officers and their families are being protected around the clock by hundreds of officers. Neiman said that protection will continue "until the threat no longer exists."
Police asked anyone with information to call a joint tip line at 213-486-6860 or 800-222-8477. They said anyone who sees Dorner should call 911.