It happened along the 1900 block of Calhoun Street.
Authorities tell Action News that an altercation ensued between an officer and an armed suspect sometime after 5 p.m.
Officer involved shooting in Trenton. Prelim reports from Mercer Co Pros: suspect was armed & had an encounter w/a Trenton Police Officer. Suspect was shot in the head by police & taken in critical condition to a nearby hospital. @6abc pic.twitter.com/N6vQkHjkpn— Annie McCormick (@6abcAnnie) September 29, 2019
The Mercer County Prosecutor's Office says an officer opened fire on the armed suspect.
"We heard the officers chasing the guy down, we don't know exactly what happened. But when they came to this location gunshots erupted," said James Brown, who lives nearby.
The suspect was shot in the head and rushed to an area hospital. The suspect is listed in critical condition at this time.
Brown says he did not see the suspect with a weapon but described to Action News the police response and how an officer jumped out of the vehicle shortly before shots were fired.
"He jumped out of the car and yelled at the guy to get out of the car. As he was saying get out of the car, one time bang, bang, bang-- they dumped seven shots in the car," Brown added.
No word on if any officers were injured.
The suspect has not yet been identified.