BETHLEHEM, Pa. -

A man ripped a large clump of hair from his girlfriend's head while threatening her with a knife, officials said.

Marcus Grantham yanked the hair from the top of his girlfriend's head after hitting her several times in the face and then pulling out a pocket knife and holding it against her throat, officials said.

The attack took place around 3:30 p.m. Wednesday during an argument in their home in the 600 block of Shields Street in Bethlehem, officials said.

Grantham, 20, was charged with assault, harassment and reckless endangerment and committed to the Northampton County Prison on $15,000 bail, according to court documents.

A preliminary hearing is set for Oct. 30.