"I was there under duress, OK?" DeLeo says. "There were 20,000 screaming 11-year-olds. I'd never do it again. Not that I don't love my daughter, but, oh, my god, it was torture."

Blood-splotches on walls, chains hanging from a ceiling and swords on the killing floor — the artifacts left a disturbing tale of brutalities inside a suspected al-Qaida in Iraq torture chamber. But there was yet another chilling fact outside the dirt-floor dungeon. Villagers say they knew about the torment but were too intimidated by extremists to tell authorities until now.

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The reports and tips now pouring in build a harrowing portrait of rule under al-Qaida and its backers: mass graves, ruthless punishments, self-styled Islamic courts ordering summary executions.Scrawled in white paint above a bed in the torture area was a Quranic phrase in Arabic normally used to welcome a guest. But the context suggested only sadistic mockery: "Come in, you are safe."

The floor was littered with food wrappers, plastic soda bottles and electric cables that snaked to a metal bed frame, presumably where detainees were shocked, according to the U.S. account of the discovery during a Dec. 8-11 mission.

The rooms "had chains, a bed — an iron bed that was still connected to a battery — knives and swords that were still covered in blood," said U.S. Army Maj. Gen. Mark P. Hertling, the top U.S. commander in northern Iraq.

Nearby were nine mass graves containing the remains of 26 people, he said.

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Both Sunni insurgents and Shiite militia death squads regularly torture their captives before killing them — sometimes with power drills. Most of the hundreds of bodies that have turned up in Baghdad and other parts of Iraq show signs of torture.

Villagers knew about the torture site, but did not tell authorities as they were afraid of reprisals from the militants, a local policeman told The Associated Press. He spoke on condition of anonymity as he was still afraid of being targeted by extremists.