The 105-page report contained the testimony of dozens of women. They included one who said officers obtained a confession from her by threatening to rape her teenage daughter. Seven months after speaking to HRW, the woman was executed.
Allegations of abuse are not new, but the findings by the New York-based rights group which come despite government pledges of reform raise concerns about Iraq's ability to handle those detained in massive security sweeps targeting militants.
Human Rights Watch said that women have been held for months or even years without charge before seeing a judge. Many were rounded up for alleged terrorist activities by male family members. Interviewed detainees described being kicked, slapped, raped or threatened with sexual assault by security forces.
"Iraqi security forces and officials act as if brutally abusing women will make the country safer," said Joe Stork, deputy Middle East and North Africa director at Human Rights Watch. "In fact, these women and their relatives have told us that as long as security forces abuse people with impunity, we can only expect security conditions to worsen," Stork said.
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The group also called on the Iraqis to acknowledge the prevalence of abuse, promptly investigate allegations of torture and ill-treatment and to urgently make judicial and security sector reforms.
One detainee entered her interview with the group in Iraq's death row facility in Baghdad's Kazmiyah prison on crutches. She said nine days of beatings, shocks, and being hung upside down had left her permanently disabled.
Israa Salah, not her real name, said she had been arrested by US and Iraqi forces in January 2010 when she was in cousin's home. She was taken to the Interior Ministry's Criminal Investigations Department where she tortured until she confessed to terrorism charges against her will.