**(Reuters) - Two Tunisian men who spent 12 years in U.S. custody in Afghanistan said CIA interrogators tortured them using previously unreported techniques that included threatening them with a makeshift electric chair and beating them with batons so brutally that they suffered broken bones, Human Rights Watch reported on Monday.
The accounts, which could not be independently confirmed, raised new questions about how prisoners were treated in a former CIA prison in Afghanistan that remains shrouded in secrecy.
Ryan Trapani, a CIA spokesman, said the “CIA reviewed its records and found nothing to support these new claims.”
But Daniel Jones, who led a Senate investigation into the CIA detention program, said the accounts given by the two men, Ridha al-Najjar, 51, and Lotfi al-Arabi El Gherissi, 52, were important because so little is known about the “Cobalt” black site, where an Afghan detainee froze to death in 2002.
“The committee found that the COBALT detention site kept so few written records that it was impossible for the Senate, or the CIA, to determine how many individuals were detained there,” Jones said. “And what exactly was done to those detained.”**
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