(AP) — Authorities say a man has been accused of trying to sexually assault a woman outside her Jazzercise class in Omaha.

Omaha police arrested 25-year-old Glenn Nickerson in connection with the Monday morning incident.

The woman told police she encountered a man who appeared to be touching himself as she left her fitness class. She said the man grabbed her by the shoulders as she walked to her car.

Police say the woman screamed for help. Nickerson fled, but he’s accused of punching a nearby witness. He’s also accused of touching himself at a clothing store several hours later.

Nickerson faces charges of first-degree sexual assault, criminal trespassing, lewd conduct and misdemeanor assault.

Court records do not list an attorney.