The Knox County Sheriff’s Office is investigating an incident that left three people injured in a bar fight and one car destroyed in a fire June 7.

Three people sustained injuries during a late-night altercation involving a knife at the Sand Bar on Main Street. One of the injured was a bystander trying to stop a fight, according to a press release from Chief Deputy Tim Carroll.

Knox County Sheriff's Deputy Robert Potter was called to a residence on Summer Street regarding someone who had been in a fight and cut with a knife. While en route to the scene, Potter was informed that two other people were at the Sand Bar, also injured from the fight, said the news release.

The initial part of the investigation allegedly reveals Jason Hamilton, 41, and Christopher Weller, 26, both of Vinalhaven, were fighting at the bar.

According to a witness, the two were fighting and Weller pulled out a knife. The witness, a female, attempted to break up the fight and was cut by Weller, said the release.

The woman refused to write a statement and refused medical treatment. First responders from Vinalhaven Rescue tended to her as she had a cut across her forehead.

Potter then went to Weller’s residence to find he also had bruises to his head and face and a cut on the wrist. Weller did not seek medical attention.

Potter arrested Weller for elevated aggravated assault, Class A and Weller was transported to the Knox County Jail with assistance from the U.S. Coast Guard.

Later in the night, at nearly 1 a.m., Potter was called to a report of a vehicle on fire near the intersection of Atlantic and Main streets.

The vehicle was engulfed in flames upon arrival. The Vinalhaven Fire Department extinguished the flames, but the vehicle was a total loss.

The Maine State Fire Marshall’s Office has been called to assist the investigation as the vehicle belonged to Christopher Weller. The cause of the fire is presumed to be suspicious, said the release.

Both incidents remain under investigation.