A 15-year-old girl is accused of stabbing her grandmother to death in a “tragic incident” at a Pennsylvania home, police and news reports say.

Officers in Philadelphia responded to a report of a stabbing at a home at 2 a.m. on Wednesday, May 1, police said. The 15-year-old granddaughter made the 911 call, police told WPVI.

A 67-year-old woman was found with stab wounds to her stomach and right hand, police said. She was pronounced dead at the scene.

Her granddaughter was identified as a suspect in the fatal stabbing attack, according to KYW and WPVI. Police said she was arrested and the weapon used in the attack was recovered.

It’s unclear what led to the stabbing, only that the incident was preceded by a “domestic dispute,” Capt. Anthony Ganard told WCAU. The girl and her grandmother were the only people in the home when officers arrived.

No charges had been filed as of Wednesday morning. The grandmother was the teenager’s legal guardian, KYW reported.

Police have not released the identities of the grandmother and the girl.

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