MOUNT GRETNA, Pa. (AP) — Police are searching for an 18-year-old Pennsylvania man accused of threatening two nurses at gunpoint so he could take his girlfriend from a secure mental health care facility.

Cornwall Borough Police said Wednesday they’d obtained an arrest warrant for Elliott Ravert, of Narvon, charging him with robbery, aggravated assault and terroristic threats.

He’s accused of taking 21-year-old Alicia Buzzard from Philhaven Hospital in Mount Gretna on Tuesday night. Authorities aren’t sure if she went willingly with Ravert.

Police say he threatened to shoot the nurses if they didn’t cooperate, and took a two-way radio from one of them.

Ravert drives a green 2004 Chevy Avalanche with Pennsylvania license plate ZGY-3594.

Buzzard’s sister tells LNP that Buzzard has known Ravert for about three months and has a bipolar disorder.