Inc.’s Seattle headquarters were evacuated Monday following a bomb threat, police say. According to the report, Amazon CEO Jeff Bezos helped his security team evacuate the buildings after a written threat was found in a bathroom at the retailer’s South Lake Union campus.

Amazon staffers alerted company security that they had found the note sometime before 10:30 a.m. PST, when police say they were called to investigate the threat. One Amazon employee told Seattle’s KOMO-TV he was ordered to evacuate via an email.

Update: Seattle police tell Bloomberg that the threat was false, and that nothing was turned up in their search. Det. Patrick Michaud said that police left Amazon headquarters shortly after 1 p.m. PST. 

Seattle police say they deployed a arson and bomb squad along with explosive detection dogs to Amazon headquarters “out of an abundance of caution.” Amazon security searched buildings along with police, it said.

A number of people who don’t work for Amazon but utilized the building’s parking lot returned from shopping to find that their cars were locked down as well, KOMO-TV reported. An Amazon spokesman couldn't be immediately reached for comment.