ANDOVER — A suspicious powder discovered in an envelope in the mail room of the Internal Revenue Service Center triggered an investigation by state and local fire officials last night.
They determined that the material did not pose a threat, according to fire Deputy Chief James Dolan. The powder was found at around 6:30 p.m., Dolan said.
The area near the mail room was ordered into lockdown. The state Department of Fire Services sent a Hazardous Materials Response Team while Engine 3 and the ambulance from the Andover Fire Department were sent to the IRS Center at 310 Lowell St.
The Hazardous Materials Response Team tested the air near the mail room, Dolan said.
Fire officials are trying to find out who sent the envelope, he said.
“Everything was deemed normal,” Dolan said. At 9 p.m., workers at the center, which employs roughly 3,500 people, were coming and going, without any sign of a crisis.
“We err on the side of caution,” Dolan said.