Planned Parenthood not only dumps the remains of aborted babies in landfills as earlier reported but also "steam-cooks" them prior to disposal, a report from Ohio's attorney general revealed.

Ohio Attorney General Mike DeWine told Cincinnati.com last Friday that a four-month study conducted by his office showed that the biggest abortion service provider in America, which is supposedly a non-profit healthcare organisation for women, was not in compliance with "humane" disposal methods required by law.

"First, steam-cooking foetuses and then disposing of them in a landfill is not humane," DeWine said, according to a WND report.

"It will come as a shock to Ohioans to find out that foetuses are being cooked and then they're being put in a landfill, and they're going to be mixed in with the garbage and whatever else goes into a landfill," DeWine said.

Planned Parenthood immediately filed a lawsuit in a Cincinnati federal court to contest the Ohio attorney general's report.

On Monday, a U.S. judge temporarily blocked Ohio from initiating legal action against three Planned Parenthood facilities which the state's attorney general accused last week of violating rules for disposal of foetal remains, Reuters reported.

Planned Parenthood denied violating any Ohio state rules, saying DeWine had singled out the organisation over all other healthcare providers in violation of its rights to due process and equal protection under the U.S. Constitution.

However, Troy Newman, president of the abortion-practitioner watchdog Operation Rescue, told LifeNews.com that Planned Parenthood's lawsuit was an attempt to distract from the issue at hand.

"[It's] an obvious ploy to deflect attention from their own lawbreaking by falsely accusing the attorney general," Newman said Monday. "But perhaps the larger question is if dumping the cooked remains of aborted babies in landfills is inhumane, shouldn't we also consider the dismemberment deaths of these babies through suction or other procedures more inhumane?"

U.S. Sen. Rob Portman, R-Ohio, said Friday he would look into the "next steps at the federal level" to ban disposal methods used by Planned Parenthood, Cincinnati.com reported.

DeWine launched an investigation on Planned Parenthood's practices in July after undercover videos by the Center for Medical Progress showed the organisation's representatives discussing prices for foetal tissue, WND reported.

DeWine's investigators did not find evidence of the selling of foetal tissue in Planned Parenthood affiliates in Ohio. However, they concluded in the report that Planned Parenthood affiliates were in violation of rules mandating foetuses "shall be disposed of in a humane manner."

Republicans in the Ohio House of Representatives introduced proposals on Monday that would require clinics to dispose of post-abortion remains by burial or cremation and for women to chose the method on a state health department form.