LAMBERTVILLE — A man was shot in the arm Wednesday night when he interrupted a suspect trying to puncture his vehicle’s tires with a knife, authorities said.

The incident happened about 11 p.m. in the 3300 block of Deepwood in Lambertville, according to the Monroe County Sheriff’s department.

When confronted, the assailant shot a small caliber pistol at the victim, grazing his left upper arm. The victim was treated at the scene and was to seek medical treatment on his own, sheriff's deputies said.

The suspect was described as being in his mid-20s to early 30s, white, of medium build, and about 6 feet tall. He was wearing a dark-colored T-shirt, jeans, and a dark-colored baseball hat.

He appeared to be in his mid-20s or early 30s.

The Monroe County Sheriff’s Office is requesting anyone with information to contact the detective bureau at 734-240-7530.

First Published August 11, 2011, 4:15 p.m.