Possible Christopher Dorner sighting - WKOW 27: Madison, WI Breaking News, Weather and Sports

Possible Christopher Dorner sighting

NORTHRIDGE, CA (WKOW) -- A home improvement store in Northridge, CA was evacuated Sunday night after a possible sighting of suspected cop-killer Christopher Dorner, ABC News is reporting.

The unconfirmed sighting came just hours after police announced a $1 million reward for information leading to Dorner's arrest.

"This is the largest local reward ever offered, to our knowledge," Los Angeles Police Chief Charlie Beck said at a news conference Sunday. "This is an act of domestic terrorism. This is a man who has targeted those that we entrust to protect the public. His actions cannot go unanswered."

As helicopters hovered overhead and a command center was established, police searched the Lowe's store and told shoppers they could leave, but could not take their cars out of the parking lot.

Los Angels Police Department(LAPD) spokesman Gus Villanueva couldn't say whether Dorner was in the area.

Authorities in Big Bear, CA, west of Los Angeles, scaled back their search for Dorner Sunday. His charred truck was found in Big Bear on Thursday.

Sunday was the fourth day of the manhunt.

Dorner is suspected of going on a killing spree last week to avenge his firing from the police force. A police officer is among the three people he is suspected of killing. 

In what is being called a manifesto, Dorner said he will keep killing until the truth is known about his case.

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