BANGOR — A 45-year-old Bangor man who was subdued by five female college students after allegedly attacking his estranged wife has pleaded not guilty to attempted murder and other charges.

Horst Wolk remained in jail on $50,000 bail after Tuesday’s arraignment in Penobscot County Superior Court. A trial date has not been set.

Wolk, a German national, is accused of stabbing his wife in the neck and leg on May 5 on the campus of Husson University in Bangor.

Police credited five female students, including one who had recently completed a self-defense class, with coming to the woman’s aid and subduing Wolk.

The Bangor Daily News says the victim told police she had received a temporary protection from abuse order against Wolk about two weeks prior to the attack.