BATTLE CREEK, MI -- An accidental shooting in Calhoun County is under investigation.

Deputies say a 13-year-old Pennfield boy and a 19-year-old Pennfield woman were target shooting behind a home in the 100 block of Clarence Boulevard Monday afternoon. When they had finished and were walking back to the house, the boy's firearm accidentally went off.

The bullet struck the woman in the right side of her body, causing damage to her right arm and torso and penetrating her lung, according to a news release from Calhoun County Sheriff's Office.

The woman was taken to Bronson Methodist Hospital in Kalamazoo, where she is in critical but stable condition, police say. The 20-gauge shotgun was seized by police, and the case remains under investigation.