A Union Beach man is accused of intentionally setting a fire in the Hazlet first aid building where he was a member, according to the Monmouth County Prosecutors Office.

43-year-old Ronald Schroeder was charged with aggravated arson Monday, one day after the 5:07 p.m. blaze, Acting Monmouth County Prosecutor Christopher Gramiccioni said in a release.

An investigation determined the fire was sent intentionally in a lounge area. Schroeder was the only member of the first aid squad in the building at the time and was seen leaving the facility, said Gramiccioni.

Gramiccioni said Schroeder had only been a member for a "short period of time," and left the building when the fire began to intensify, then came back while firefighters were on the scene. Firefighters from several departments extinguished the blaze.

Schroeder was being held on $100,000 bail at the Monmouth County Correctional Institution.

The case was investigated by the Prosecutor's Office, Hazlet Police and the Monmouth County Fire Marshal’s Office jointly investigated the case.