Hanscom Air Force Base in MA has closed a gate and evacuated the nearby area after a suspicious truck prompted officials to call in the bomb squad.
The Massachusetts State Police's bomb squad responded to the base where a box truck is secured. A woman who answered the phone at the company's Acton headquarters said "we don't know what's going on" and declined further comment.
As a precaution, the base's Vandenberg Gate was temporarily closed and several facilities were evacuated.
Emergency services were called to Hanscom Air Force Base in MA at around 9.45am.
Two people that were in the truck were pulled aside and questioned by authorities.
Police have set up a perimeter 1,500 feet in every direction from the truck.
The Hanscom news release states that pallets from the truck contained some "potentially concerning residue", and they have been removed from the area to be taken to a specialized facility for testing.
After 'No Compromise' Warning, China Makes New Accusation Against India
The report asked New Delhi to safeguard the security of Chinese-funded institutions against possible anti-China riots. The editorial said India would suffer greater losses than it did in 1962, if it incited conflict.
North Korea fires ballistic missile that 'could reach Alaska'
Department of the Treasury placed sanctions on China's bank of Dandong due to suspicions of illicit transactions with North Korea. He pronounced his intention to cooperate with Japan and South Korea to increase pressure on North Korea by enforcing sanctions .
Ivanka works for free, but Trump White House can pay well
Half the 200 men working at the White House make $115,000 or more annually, while half the 177 women earn $75,000 a year or less. Ivanka Trump took her plea for equal pay for equal work directly to CEOs at a Tuesday summit at the White House.
An exit from Route 2A, a major roadway leading to the base, is closed while authorities investigate.
There have been no reports of injuries.
Bedford Police said they are monitoring the situation but that there is "no danger to the community at this time".
The base is home to the 66th Medical Squadron and is one of five centers under the Air Force Materiel Command. More than 10,000 active duty, Reserve and National Guard personnel; defense contractors and civilians are supported or employed by Hanscom.
The majority of Hanscom is in Bedford, but parts are also in the adjoining towns of Concord and Lincoln.
Hanscom Field airport, which has a different entrance, remains open.