A Massachusetts man has been charged in the beating death of his girlfriend at a beach in York.

State Police said local authorities in York received multiple 911 calls reporting a man assaulting a woman behind a large rock at Short Sands Beach at around 4 p.m. on Friday.

Arriving officers detained Jeffrey Buchannan, 33, of Bedford, Massachusetts and found Rhonda Pattelena, 35, also of Bedford, dead behind the rock.

State police say the two were domestic partners and had one mutual child.

Buchannan is in custody at York County Jail. It’s not immediately clear if he has a lawyer.