State Police are asking the public’s help to identify a motorcyclist who was involved in a road rage incident on the Zakim Bridge on Monday afternoon.

It happened at 2:40 p.m. on Route 93 southbound, and police posted a video of the interaction on the State Police Facebook page. The video shows an older man on a motorcycle who appears to be yelling at the person shooting the video. He also appears to punch the side of the vehicle with his fist before riding away.

The motorcyclist was sporting a gray beard and wearing a black helmet, sunglasses, and a yellow T-shirt emblazoned with the Harley-Davidson logo and the slogan “Ride To Live.”