The Pulitzer Prize board announced Friday that it had concluded its review of sexual misconduct allegations against the award-winning novelist Junot Díaz and found no reason to remove him from the board.

During the five-month inquiry, the board said, an outside law firm interviewed dozens of witnesses and analyzed hundreds of documents, as well as audiotapes, according to a news release. The board said the review “did not find evidence warranting removal” of Mr. Díaz from its ranks.

In May, Mr. Díaz stepped down as chairman of the board shortly after the sexual misconduct allegations became public. The week before, the writer Zinzi Clemmons accused Mr. Díaz of forcibly kissing her when she was a graduate student at Columbia University, prompting a divisive debate within the literary world over Mr. Díaz’s actions and whether he should be held accountable.

In a statement provided by his publicist, Nicole Aragi, responding to the Pulitzer board’s decision, Mr. Díaz said that he “welcomed the Pulitzer’s independent investigation and was heartened by its thoroughness and determination to run down every detail.”