Turkey said Thursday that autopsies of Syrian victims from this week's assault in Syria's Idlib province show they were subjected to chemical weapons as France's foreign minister called for the prosecution of President Bashar Assad's government amid growing international outrage over the assault that activists say killed 86 people.
Damascus maintains it didn't use chemical weapons, instead blaming the rebels for stockpiling the deadly substance.
"I stress, once again, that the Syrian Arab Army did and will not use such weapons even against the terrorists who are targeting our people," Syria's Foreign Minister Walid Moallem told reporters in Damascus.
In Turkey, state-run Anadolu and the private DHA news agencies quoted Justice Minister Bekir Bozdag as saying that "it was determined after the autopsy that a chemical weapon was used."
Turkish officials say that close to 60 victims of the attack were brought to Turkey for treatment and three of them died.
Tuesday's attack happened just 60 miles from the Turkish border, and the Turkish government -- a close ally of Syrian rebels -- set up a decontamination center at a border crossing in the province of Hatay, where the victims were initially treated before being moved to hospitals.
Russia's Defense Ministry said the toxic agents were released when a Syrian airstrike hit a rebel chemical weapons arsenal and munitions factory on the town's eastern outskirts.
At the press conference in Damascus, Moallem also echoed that statement, saying the Syrian army bombed a warehouse belonging to al-Qaida's branch in Syria which contained chemical weapons. He did not say whether the government knew in advance that the warehouse contained chemical weapons.
Asked whether his country would give access to a fact-finding mission over the use of chemical weapons, he said: "Our experiences with international investigating committees were not encouraging, because they come out of Damascus with certain indications which then change at their headquarters."
He said Damascus wants guarantees that any investigation would be impartial and non-politicized. He also said such a committee should start from Damascus and not from Turkey. "Once we reach convincing answers we will give our answer," he said.
The area of the town is difficult to access and as more time passes in the aftermath of the attack, it will be increasingly difficult to determine exactly what happened.
Turkish media have reported that World Health Organization experts took part in the autopsies of Syrian victims conducted in a hospital in the Turkish city of Adana late Wednesday.
In France, Foreign Minister Jean-Marc Ayrault urged for a resumption of Syrian peace talks and said he wants Assad's government prosecuted over its alleged use of chemical weapons.
He told CNews television on Thursday that a new U.N. resolution and Syrian peace negotiations should be a top priority -- not rushing into new military interventions. Ayrault said that "France is still seeking to talk with its partners on the Security Council ... Russia in particular."
"These crimes must not remain unpunished. ... One day, international justice will rule on Assad," Ayrault said.
Russia argued at a U.N. Security Council meeting on Wednesday against holding Assad's government responsible for the Idlib attack. The U.S. ambassador to the United Nations, Nikki Haley, warned that the Trump administration would take action if the Security Council did not.
U.S. President Donald Trump and other world leaders said the Syrian government was to blame, but Moscow, a key ally of Assad, said the assault was caused by a Syrian airstrike that hit a rebel stockpile of chemical arms.
Early U.S. assessments showed the use of chlorine gas and traces of the nerve agent sarin in the attack Tuesday that terrorized Khan Sheikhoun, according to two U.S. officials who weren't authorized to speak publicly on the matter and demanded anonymity.
The effects of the attack overwhelmed hospitals around the town, leading paramedics to send patients to medical facilities across rebel-held areas in northern Syria, as well as to Turkey. The Turkish Health Ministry said three victims died receiving treatment inside its borders. The Britain-based Syrian Observatory for Human Rights monitoring group put the toll so far at 86 killed.
Victims of the attack showed signs of nerve gas exposure, the World Health Organization and Doctors Without Borders said, including suffocation, foaming at the mouth, convulsions, constricted pupils and involuntary defecation. Paramedics were using fire hoses to wash the chemicals from the bodies of victims.
Medical teams also reported smelling bleach on survivors of the attack, suggesting chlorine gas was also used, Doctors Without Borders said.
The magnitude of the attack was reflected in the images of the dead -- children piled in heaps for burial, a father carrying his lifeless young twins.
The visuals from the scene were reminiscent of a 2013 nerve gas attack on the suburbs of Damascus that left hundreds dead and prompted an agreement brokered by the U.S. and Russia to disarm Assad's chemical stockpile. Western nations blamed government forces for that attack, where effects were concentrated on opposition-held areas.