Prime Minister Nouri al-Maliki, a Shiite, announced an investigation Feb. 19 but cleared the officers the following day, stirring outrage among Sunni politicians.
Al-Maliki said the rape claim was fabricated to tarnish the reputation of the police and the ongoing security crackdown in Baghdad.
Friday's statement from the Islamic State of Iraq referred to the rape victim by her name and identified her as Sunni.
However, officials of the Iraqi Islamic Party, the country's largest Sunni group, said the woman used a false name and that she is in fact a Shiite. The party's human rights office had been looking into the case.
Names of the officers involved in the case were not released, and it was unknown whether they were Sunni or Shiite.
In Baghdad, two car bombs killed at least 11 people in attacks on Friday. The deadlier occurred at a used car lot near the Shiite militia stronghold of Sadr City, killing 10 people, wounding 17 and setting several cars ablaze, police said.
The other blast was near a police patrol in southwest Baghdad, killing a policeman and wounding two civilians, police reported.
RSS