London ? One Guantanamo prisoner told a military panel that American troops beat him so badly he wets his pants now. Another detainee claimed U.S. troops stripped prisoners in Afghanistan and intimidated them with dogs so they would admit to militant activity.

Tales of alleged abuse and forced confessions are among some 1,000 pages of tribunal transcripts the U.S. government released to The Associated Press under a Freedom of Information Act lawsuit – the second batch of documents the AP has received in 10 days.

The testimonies offer a glimpse into the secretive world of Guantanamo Bay, Cuba, where about 520 men from 40 countries remain held, accused of having links to Afghanistan’s ousted Taliban regime or Osama bin Laden’s al-Qaida network. Many have been held for three years.

Whether the stories are true may never be known. And it wasn’t immediately clear how many abuse allegations had been logged from the tribunals or how many of them had been investigated. Dozens of complaints have surfaced from detention missions in Afghanistan, Iraq and Guantanamo, but the government couldn’t offer a breakdown Monday.

One detainee, whose name and nationality were blacked out like most others in the transcripts, said his medical problems from alleged abuse had not been taken seriously.

“Americans hit me and beat me up so badly I believe I’m sexually dysfunctional. I don’t know if I’ll be able to sleep with my wife or not,” he said. “I can’t control my urination, and sometimes I put toilet paper down there so I won’t wet my pants.”

“I point to where the pain is. : I think they take it as a joke and they laugh.”

The tribunal president promised to take up the man’s medical complaint, but in five pages of questioning never brought up the alleged abuse.

The panel members were charged with determining whether the men were enemy combatants – not with investigating abuse allegations, said a military spokeswoman, Navy Capt. Beci Brenton. She said tribunal members were supposed to forward abuse allegations to the Joint Task Force running the detention mission, which then forwards them to U.S. Southern Command in Miami.

In a statement Sunday, the Pentagon said many of the men had been trained to lie. U.S. troops treat detainees humanely and “U.S. policy condemns and prohibits torture,” the statement said, adding that authorities take claims of abuse seriously.