The Washington Post said Monday it had caught conservative activist James O'Keefe attempting to sting the newspaper by offering up a woman with fake accusations that she was impregnated as a teenager by Roy Moore.

The Post reported that two weeks ago one of the paper's reporters received a message from a woman claiming that Moore had impregnated her when she was a teenager in the early 1990s, when she was 15, and that it led to an abortion.

"The Post did not publish an article based on her unsubstantiated account," the report said. "When Post reporters confronted her with inconsistencies in her story and an Internet posting that raised doubts about her motivations, she insisted that she was not working with any organization that targets journalists."

O'Keefe's nonprofit Project Veritas has done several stings in the past wherein alleged liberal media bias is uncovered at outlets like CNN and the New York Times.

The Post's report said that the woman who made the claims against Moore, the Republican candidate for U.S. Senate in Alabama, was seen entering the Project Veritas New York-based office on Monday and that she nor O'Keefe would answer questions when approached by the paper's reporters.

Several other women have accused Moore of making sexual advances on them when they were teenagers and he was in his 30s. Moore has denied the claims and many of his supporters are suspicious that the media, the Post in particular, have published false stories.

O'Keefe said on Twitter Monday that he was preparing his own video story about the matter, including "hidden camera footage into [the] Washington Post."