An Illinois House Republican lawmaker appointed to the General Assembly’s sexual harassment task force is expected to resign from office Wednesday, following allegations from his ex-girlfriend of improper online sexual activity, House GOP Leader Jim Durkin said.

State Rep. Nick Sauer, of Lake Barrington, was accused by an ex-girlfriend of sending nude photos of her to other men online, according to a report from Politico published Wednesday. The ex-girlfriend has filed a complaint about the matter to the Chicago Police Department and the Office of the Legislative Inspector General, Politico reported.

The Chicago Tribune’s attempts to reach Sauer on Wednesday morning were unsuccessful.

“The allegations that have come forth against Representative Nick Sauer are troubling. He will be resigning from office today. We should allow the proper authorities to conduct their investigations,” Durkin said in a statement.

Sauer, a first-term lawmaker seeking re-election this fall, is a member of the House Sexual Discrimination and Harassment task force, impaneled late last year in the wake of mounting sexual harassment allegations at the state Capitol.

“These are very serious allegations and Representative Nick Sauer has made the right decision to resign his seat in the Illinois House of Representatives,” said state Sen. Dan McConchie, R-Hawthorne Woods, said.