Michael Hengel, editor of The Las Vegas Review-Journal, announced his resignation on Tuesday, less than two weeks after the billionaire casino magnate Sheldon Adelson bought the newspaper and days after it published an article that was indirectly critical of the new owners.

In an announcement to the newsroom, Mr. Hengel said he was offered a voluntary buyout, according to reporters who were present at the meeting.

The Review-Journal reported last week that Mr. Adelson and his family were behind the $140 million purchase of the newspaper. The identity of the buyer had been kept private after the sale was announced, which raised questions about the new owners’ transparency.

In a statement that was expected to appear on the front page of The Review-Journal on Wednesday, the newspaper’s new owners said Mr. Hengel had accepted a voluntary buyout offer from the previous owners and that offers were also made to “other qualified employees.” Other employees have accepted the buyout offer, the statement said.