Omaha, Neb. ? Nebraska offensive lineman Andy Christensen was arrested early Saturday, suspected of sexual assault after an overnight incident at a downtown bar in Lincoln.

A 23-year-old Lincoln woman reported that Christensen approached her from behind, reached underneath her clothing and sexually assaulted her about 12:30 a.m., Lincoln police Capt. Joseph Wright said.

Wright said Christensen was arrested outside the Brass Rail bar for first-degree sexual assault, resisting arrest and failure to comply. Prosecutors would decide on formal charges and Christensen would be arraigned Monday, Wright said.