An argument “over nothing’’ between two women at a Hingham restaurant erupted into an armed confrontation this week as the FBI employee sitting between them put a gun to one of their heads, according to court documents.

A police report filed in Hingham District Court describes how the Tuesday night incident at Gourmet Garden restaurant unfolded, leading to the arrest of James M. Doyle of Duxbury, who told police that he is a supervisor at the federal agency and a friend of the victim.

He acknowledged that he had pointed the gun at one of the women, the report said, but said it was a “big mistake,’’ and that the argument was “over nothing.’’ The victim in the case was not injured. Authorities allege that Doyle was drunk at the time.

Doyle faces charges of assault and battery with a dangerous weapon, possessing a firearm while intoxicated, and disorderly conduct.

He was arraigned on Wednesday and released on personal recognizance, but he was ordered to stay drug- and alcohol-free, and to stay away from the victim and the Gourmet Garden, a Chinese and Japanese eatery on Whiting Street.

Doyle must also surrender his firearms. Police have said Doyle had a permit for the weapon he was carrying. An attorney for Doyle could not be reached for comment.

FBI officials on Thursday said they could not immediately elaborate on Doyle’s role. In a statement on Wednesday, Harold H. Shaw, special agent in charge of the agency’s Boston bureau, said the FBI “takes allegations of misconduct very seriously’’ and is cooperating with local police.

A person who answered the phone at Gourmet Garden declined to discuss the incident.

According to the police report, officers were called to the restaurant at 8:48 p.m. Tuesday. They arrived to find a witness who looked fearful and told them she had seen a man put a gun to another woman’s head. She pointed to Doyle and said, “Be careful, he has a gun!’’ according to the report.

Officers said they “detected a strong odor of alcohol’’ on Doyle, and said he had glassy eyes, slurred his speech, and was unsteady on his feet. Police took his Glock 22 and arrested him.

According to the report, police have been unable to discuss the incident with the victim. They located her residence in Hull, the documents say, but her husband told investigators she had “nothing to say.’’

Andy Rosen can be reached at andrew.rosen@globe.com. Follow him on Twitter at @andyrosen.