A St. Paul man cut the throat of a woman who refused to have sex with him, authorities say.

Police responded to the report of the attack around 9:30 p.m. Saturday at St. Joseph’s Hospital.

They met with a 26-year-old woman being treated there. The woman said a man attacked her near Assumption Church earlier that evening, according to court documents.

Investigators talked with two witnesses of the attack, one of whom helped lead them to Sam E. Neuman.

Police found the 46-year-old inside an apartment on Exchange Street with blood on him and asked him about the alleged attack, according to a criminal complaint filed against him Tuesday in Ramsey County District Court.

Neuman said he was walking around near Xcel Energy Center that day when two men and a woman tried to jump him, court documents say. He said the woman hit him, and he defended himself. He denied stabbing her.

Hospital staff transferred the woman to Regions Hospital due to the extent of her injuries.

Her throat had been cut from one side to the other.

She later identified Neuman in a line-up as the man who attacked her.

She told police the two of them had been smoking crack all day and that Neuman wanted her to have sex with him as payment for the drugs.

She refused, and later Neuman came up behind her and cut her throat with a knife, according to the criminal complaint.

Neuman was charged with one count of attempted murder and a second count of first-degree assault causing great bodily harm.

Neuman is a predatory offender with sexual assault arrests out of Illinois, authorities say.

He has no criminal history in Minnesota.