An 18-year-old man was arrested Sunday after his revolver went off while he was handing it to a friend, according to St. Paul police reports.

Police did not name the 18-year-old victim. He sustained minor injuries to his hand, police said.

Alfonzo N. Robinson, of South St. Paul, has been friends with the victim since childhood, Sgt. Paul Paulos said.

Police believe the shooting was accidental, but Robinson was booked on suspicion of carrying a gun outside his home without a permit, Paulos said.

Katie Kather can be reached at 651-228-5006. Follow her at twitter.com/ktkather.