A 15-year-old teenage boy was unintentionally shot in the abdomen Thursday evening as his father and his father’s friend were working with a handgun in a garage.

The teen was in surgery in stable condition as of 8:30 p.m. Thursday, according to Vacaville Police Sgt. Charlie Spruill.

The Vacaville Fire Department and Police Department had responded to a reported accidental shooting at a residence in the 200 block of Cedar Street just before 6 p.m.

The teen’s father and his father’s friend had been in the garage of the residence manipulating the handgun, Spruill said. They had moved the slide of the gun back.

At some point, the slide went forward and the gun discharged. Neither adult could recollect if there was a finger on the trigger or if the gun’s safety was on at the time, Spruill said.

The teen was initially reported to have a gunshot wound to his thumb. However, paramedics learned at the scene that the wound was to his abdomen, according to Battalion Chief Jeff Ryder.

The injury appeared to not be life-threatening and the victim appeared stable at the scene, Ryder said.

He was transported by ambulance to Kaiser Vacaville.

Vacaville police are continuing their investigation. A police report will be filed, and child welfare and investigative services have been notified, Spruill said. However, no one has been arrested in connection with the incident.