Iraqi lawmakers from the Sunni-dominated bloc are accusing the country's Shiite government of torturing to death a jailed bodyguard who worked for the fugitive Sunni vice president.
The guard was held on suspicion of terrorism. Authorities say he died of kidney failure on March 15.
A Sunni lawmaker from Iraqiya, Salman al-Jumaili, demanded an investigation on Thursday. He says human rights organizations should look into the case.
Vice President Tariq al-Hashemi _ Iraq's the highest-ranking Sunni official _ has been accused of running death squads against Shiite pilgrims, government officials and security forces.
He has denied the charges and has fled to the semi-autonomous Kurdish region to avoid an arrest warrant issued in December.