Gunman on Memorial Drive in Cambridge was shooting passing cars at random, witnesses say

There is a massive police response on Memorial Drive in Cambridge Monday afternoon after witnesses say a man with a long gun opened fire on passing cars before he was shot by a responding Massachusetts State Police trooper.

It happened around 1:30 p.m. near the intersection of River Street. The Cambridge Police Department said they received 911 calls reporting gunshots in the area. Police said there is no ongoing danger to the public.

Sources told the I-Team that no troopers were shot.

Three witnesses told WBZ-TV that they were driving on Memorial Drive when a man began shooting. One driver said he stopped his car, crouched in the vehicle and a bullet pierced his car and hit his radiator. The man's coworker was driving in front of him, and a bullet also hit the headlight of that car.

A woman in a small school van was driving on her way to pick up children with special needs when the gunshots began. She said she crouched alongside another woman who was in the van. The two women said they jumped out of the van and fled through the nearby bushes.

All of the witnesses described a Massachusetts State Police trooper arriving and - within seconds - engaging the gunman, before shooting the suspect multiple times.

State police said EMS responded to the scene and at least one person was treated for gunshot injuries. They did not specify if it was the gunman.

Drivers are being asked to avoid the area as a large portion of Memorial Drive and the surrounding area is marked off with police tape and closed to traffic.

One car appears to have come to a stop off the road against a tree.

At least 15 Massachusetts State Police cruisers and Cambridge police officers were on scene.

A woman who lives in a nearby apartment building said she was sitting on her 10th floor balcony when she heard several gunshots, describing them as being fired in rapid succession. Minino Rodriguez was on the 18th floor of the building. He said he heard about 30 shots, and saw the gunman screaming in the road. 

According to the I-Team, police are investigating if the shooting is related to another incident earlier in the day in Boston.

This is a breaking news story that will be updated as more information becomes available.