A Massachusetts Police Department trooper was injured Wednesday night when his service weapon accidentally discharged, officials said.The incident happened at the department’s mounted unit barn in Acton.The trooper, who was not identified, was taken to Lahey Hospital in Burlington to be treated for non-life-threatening injuries.The incident remains under investigation.

ACTON, Mass. —

A Massachusetts Police Department trooper was injured Wednesday night when his service weapon accidentally discharged, officials said.

The incident happened at the department’s mounted unit barn in Acton.

The trooper, who was not identified, was taken to Lahey Hospital in Burlington to be treated for non-life-threatening injuries.

The incident remains under investigation.