An 8-year-old girl was wounded Sunday afternoon when she was shot in the buttocks with a gun that had been reported stolen, Arlington police say.

The shooting happened about noon in the 3800 block of Mahonia Court, near Park Springs Boulevard and West Sublett Road.

The 8-year-old, another girl and an older teenager were at the home, when police were told the victim accidentally sat on a gun that went off, Lt. Christopher Cook said.

The child was taken to Cook Children's Medical Center and is expected to survive.

Police were trying to piece together what led up to the shooting. They were initially told the incident happened outside the apartment, but officers found a spent round in a room inside and a bullet hole in the room, Cook said.

The gun — which was described as an Uzi or MAC-10 equivalent — was reported stolen out of Bastrop, he said.

The child was one of three who were shot Sunday in Tarrant County. Arlington police were investigating another incident in which a 6-year-old boy was shot in the head by his brother, and in Fort Worth a 4-year-old boy died after being shot by his sibling.