A woman was shot and killed in North College Hill, Ohio, Tuesday morning, reports Cincinnati.com.

According to police, the shooting occurred at approximately 10:15 a.m. after a man showed up to Brianna Ware’s home. The man, who is Ware’s girlfriend’s ex-boyfriend, was looking to pick up some items after the two broke up.

“He has a child with another female, they broke up, and that female is now living with Brianna and is now dating Brianna,” said North College Hill Police Chief Colonel Ryan Schrand. “He was over here to exchange property with his ex-girlfriend’s new girlfriend for the child.”

After a few trips, Ware opened the door with an AK-47 pistol aimed at the man. In response, the man, who has a concealed carry permit, pulled out his own weapon and shot Ware multiple times. Ware died on scene.

Police are unsure what caused the situation to escalate. An investigation into the shooting is ongoing.

The man who shot and killed Ware is claiming self defense. No charges have been filed at this time.