PARIS (AP) - France released an intelligence report on Monday alleging chemical weapons use by Syria's regime that dovetailed with similar U.S. claims, as President Bashar Assad warned that any military strike against his country would spark an uncontrollable regional war and spread "chaos and extremism."
The verbal crossfire, including a rejection of the Western allegations by longtime Syrian ally Russia, was part of frenzied efforts on both sides to court international public opinion after President Barack Obama said he would seek authorization from Congress before launching any military action against Assad's regime.
In an interview with French newspaper Le Figaro, Assad was quoted as saying that Syria has challenged the U.S. and France to provide proof to support their allegations, but that their leaders "have been incapable of doing that, including before their own peoples."
A Free Syrian army fighter loads a heavy mortar to be fired toward the airport in Aleppo on Monday.
"If the Americans, the French or the British had a shred of proof, they would have shown it beginning on the first day," he said, deriding Obama as "weak" and having buckled to U.S. domestic political pressure.
"We believe that a strong man is one who prevents war, not one who inflames it," Assad said.
French President Francois Hollande and Obama have been the two leaders most vocally calling for action against Assad's regime, accusing it of carrying out a deadly chemical attack against rebel-held suburbs of Damascus on Aug. 21.
The U.S. said it has proof that the Assad regime is behind attacks that Washington claims killed at least 1,429 people, including more than 400 children. Those numbers are significantly higher than the death toll of 355 provided by the aid group Doctors Without Borders.
It has marked an intolerable escalation in a two-year civil war in Syria that has left some 100,000 people dead.
The Syrian government denies the allegations, and blames opposition fighters. In the Figaro interview, Assad questioned whether an attack took place at all and refused to say whether his forces have chemical weapons.
If the U.S. and France strike, "Everyone will lose control of the situation ... Chaos and extremism will spread. The risk of a regional war exists," he added.
To back up its case, the French government published a nine-page intelligence synopsis Monday that concluded Assad's regime had launched an attack on Aug. 21 involving a "massive use of chemical agents," and could carry out similar strikes in the future.
In all, though, the French report provided little new concrete evidence beyond what U.S. officials provided over the weekend in Washington. Along with it, the French Defense Ministry posted on its Web site six clips of amateur video showing victims, some of which has already been widely available online and in the international media.
In the Figaro interview, Assad said "all the accusations are based on allegations of the terrorists and on arbitrary videos posted on the Internet."
The French report made no specific reference to the agencies involved or how the intelligence was collected about the attack, aside from referring to videos of the injured or killed, doctors' accounts, and "independent evaluations" such as one from Doctors Without Borders three days after the attack.