MADISON, Wis. -

A 19-year-old was arrested following a sexual assault and battery at an apartment party, according to Madison police.

Police were called to an apartment in the 400 block of West Gorham Street at 12:59 a.m. on Sunday after private security guards detained Frank A. Jermusek, 19, of Saint Louis Park, Minn.

Officers said Jermusek was intoxicated when he put his hands down the pants of a 19-year-old woman. When a 19-year-old man intervened, Jermusek punched him, police said.

Jermusek was arrested on suspicion of fourth-degree sexual assault, battery, two counts of disorderly conduct and underage drinking.