PHOENIX (AP)- An Arizona State University physics professor is hitting back at allegations of sexual misconduct.

Professor Lawrence Krauss issued a nine-page, written statement Wednesday denying accusations initially reported by BuzzFeed last month.

Krauss is on paid leave and says he can be "brash and outspoken, sometimes obnoxious" but he has never tried to demean or objectify others.

BuzzFeed first reported the allegations that date back a decade and reportedly occurred on and off campus.

Four ex-university employees told BuzzFeed that Krauss often made sexist remarks such as offering to buy birth control for a female colleague.

ASU officials say a review started after BuzzFeed contacted them.

Krauss resigned from a board at the Bulletin of the Atomic Scientists, which manages the Doomsday Clock. It’s a measurement by scientists of how close the planet could be to catastrophe.