NEW YORK (CNN) - The New York Post, one of the Big Apple's most widely-read tabloids, said Tuesday that one of its freelance writers plagiarized an article from the National Enquirer.

Robin Gregg, who the Post said made infrequent contributions to the paper, wrote a story in May 15 editions of the newspaper concerning Wal-Mart's decision to stop selling Kathie Lee Gifford's line of sportswear.

According to a brief statement issued by the Post, Gregg admitted to the paper Monday that he plagiarized material for the article from the National Enquirer and said he takes full responsibility.

"We were deceived by Mr. Gregg, and he will never contribute to the Post again," Editor-in-Chief Col Allan said.

The newspaper did not elaborate on what specific material was plagiarized, nor did it comment on whether it would review Gregg's previous work for the newspaper. The Post is read by about 620,000 people, a spokesman for the Audit Bureau of Circulations said.

On May 10, the New York Times publicly accused Jayson Blair, one of its former reporters, of "frequent acts of journalistic fraud," including plagiarizing other publications and making up facts, scenes and quotes. Blair, a 27-year-old who worked for the Times for five years, resigned from the paper May 1.