An off-duty MTA officer allegedly accidentally shot himself and his 3-year-old son while unloading his gun at his home in Long Island. The toddler underwent surgery, and is expected to survive.

According to authorities, 11-year veteran Jon Gigantiello was unloading his firearm at around 7 p.m on Tuesday night at his Smithtown home when he accidentally discharged it, shooting his son—the Post reports the boy was shot in the arm, though the Daily News claims he was shot in the gut. (Newsday goes with both.) The toddler was taken to St. Catherine of Siena Medical Center, where he underwent surgery. Officials say he is currently hospitalized in stable condition.

According to WABC 7, the boy's grandmother said the toddler was fine, and that the incident was just an accident.

Gigantiello, who works with the MTA's K-9 unit, suffered a graze wound to the hand. He has not yet been charged with a crime, and the MTA says local police officers are investigating the incident. “At this time, the case is in the hands of the Suffolk County Police and the Suffolk County District Attorney," MTA spokesperson Salvatore Arena told us in a statement. "Once Suffolk authorities have completed their investigation, the Internal Afffair Bureau of the MTA Police Department will proceed with its inquiry as an administrative matter.”