Washington ? The prisoner who told FBI agents in 2002 that a Quran had been flushed down a toilet at the Guantanamo Bay prison camp did not repeat the allegation during recent questioning by Army investigators, the U.S. commander of the camp said Thursday.

“We have found no credible evidence that a member of the Joint Task Force at Guantanamo Bay ever flushed a Quran down a toilet,” Brig. Gen. Jay W. Hood said at the Pentagon.

But Hood said investigators did not specifically ask the prisoner about the alleged toilet incident when they re-interviewed him May 14 at Guantanamo. Asked why, Hood indicated the investigators didn’t want to suggest to the prisoner what they were interested in.

“A toilet was not involved, nor did he give any indication of that,” Hood said.

Hood’s briefing came one day after the American Civil Liberties Union released a copy of a 2002 FBI memo that summarized the prisoner’s account of the alleged flushing incident and 10 days after Newsweek magazine retracted an item that said military investigators had confirmed such an incident. White House officials had blamed the Newsweek item for sparking rioting in Afghanistan that left 15 dead.

Hood said investigators had reviewed 31,000 documents and identified 13 incidents of “alleged mishandling” of the Quran at the detention facility at the naval base at Guantanamo Bay, Cuba. He said investigators concluded most were accidental.

Of the 13 incidents, 10 were by guards and three by interrogators, Hood said. Most of those incidents occurred in the first year and a half after the prison camp was set up in January 2002, he said.

Investigators confirmed five of the incidents involved inappropriate handling of the Quran: four involving guards and one involving an interrogator, Hood said. He did not reveal details about the incidents, except to say they “could be broadly defined as mishandling.”

Three of the five were deliberate and the other two were accidental, he said.

Investigators concluded eight other alleged incidents were not intentional, Hood said.