The manhunt for Christopher Dorner led LAPD SWAT officers to a Northridge Lowe's home improvement store after people reported seeing someone who resembled the fugitive former police officer there.

LAPD swarmed the store off Nordhoff Street about 5 p.m. Customers were escorted out of the store as police looked for any signs of Dorner.

LAPD stressed that it was an unconfirmed sighting.

There have been several reports similar to this one in recent days that didn't pan out.

The search came several hours after the LAPD issued a tactical alert as it handled the Dorner manhunt as well as security for the Grammys.

The LAPD did not detail its Grammy security arrangements, but the department regularly sends a large contingent of officers to awards shows.

This year, the Grammys occurred on the fifth day of a manhunt for Dorner, who is suspected of killing an Irvine couple and a Riverside police officer.

The tactical alert came the same day that Los Angeles Mayor Antonio Villaraigosa announced a $1-million reward for information leading to Dorner's capture.

“We will not tolerate anyone undermining the security of this community,” Villaraigosa said at a news conference at LAPD headquarters downtown. “We will not tolerate this reign of terror.”

Dorner allegedly carried out the slayings as part of a vengeful campaign sparked by his 2009 dismissal from the Los Angeles Police Department, authorities said.

Sunday's tactical alert was declared shortly after 2 p.m. In a tactical alert, officers can be held over on their shifts and do not respond to low-priority radio calls.

Officials hope the huge reward will give police the break they've been waiting for.

Police Chief Charlie Beck said the reward was "the largest local reward ever offered to our knowledge." The reason for such a significant reward, Beck said, was "not about capturing a fleeing suspect, but about preventing another crime, likely another murder."


"This is an act of domestic terrorism," Beck said of those killed and allegedly targeted by Dorner. "He has targeted those we entrust to protect the public."

A massive manhunt for Dorner began last week after the 33-year-old former officer and Navy veteran allegedly began a deadly campaign that has left an Irvine couple and a Riverside police officer dead.

The city of Los Angeles, law enforcement organizations, private groups and anonymous donors have all contributed to the reward fund, according to law enforcement sources familiar with the investigation.


Los Angeles County Supervisors Michael D. Antonovich and Mark Ridley-Thomas are expected to ask the Board of Supervisors on Tuesday to contribute $100,000 to the fund, according to Tony Bell, an Antonovich spokesman.

In addition to Los Angeles officials, representatives from the Riverside and Irvine police departments and the FBI and U.S. Marshals Service attended the news conference.

The frustrating search for Dorner has gone from Riverside to Corona to Big Bear to Point Loma in San Diego. There have been numerous false starts, but officials say the heightened publicity has not brought them closer to making an arrest.