PHILADELPHIA - Some 500 employees of a sprawling Boeing Co. facility in a southern suburb of Philadelphia were evacuated Tuesday morning after a threat was telephoned to the plant, authorities said.
Damien Mills, a company spokesman, declined to reveal the nature of the threat but said the company immediately notified local police and evacuated the workers - part of the 6,200 employees who make CH-47 Chinook helicopters and the V-22 Osprey aircraft at the facility.
"Regular operations continue at most of the plant," he told Reuters. Police were investigating the threat.
The evacuation comes amid tensions surrounding the anniversary of the September 11, 2001, attacks, when nearly 3,000 people were killed by airliners hijacked by Islamist militants.