CHICOPEE, Mass (WWLP) – Police were on Montgomery Street in Chicopee for a robbery at a gas station Thursday afternoon.

Chicopee Police Officer Mike Wilk told 22News, officers were called to a Citgo on 1057 Montgomery Street at 11:20. The alleged suspect was masked and armed with a rifle when they threatened a clerk demanding cash.

Wilk said police put a shelter in place at schools as a precaution. Officers searched the area, but the suspect was not found. After about a half-hour the shelter in place was lifted. Chicopee police are investigating the robbery. The investigation is still active.

If you have any information please contact the Chicopee Police Department at 413-594-1740.