- NEW: U.S. government denies report it is helping supply arms to rebels
- A draft report says two shipments of weapons bound for Syria have been seized
- Al-Assad says weapons are being smuggled across the borders of Turkey and Lebanon
- He dismisses the rebel Free Syrian Army, describing it as a bunch of criminals
(CNN) -- A confidential U.N. report reveals Iran is exporting arms to the Syrian government in violation of a ban on weapons sales, the same day President Bashar al-Assad blamed the violence in his country on the work of foreign-backed fighters.
The draft report describes three seizures of Iranian weapons shipments, including two bound for Syria, within the last year, a Western diplomat told CNN on Wednesday on condition of anonymity. The official was not authorized to release details to the media.
The report was drafted by a panel of experts and submitted to the U.N. Security Council's committee that monitors sanctions against Iran, the official said.
The revelations came as al-Assad, in a rare interview, told Russia 24 that weapons in the hands of rebels were flowing into the country from Lebanon and Turkey.
"You can't simply close the borders and stop the smuggling, but you can reduce the flow," he said.
Al-Assad put the blame instead on the so-called Arab Spring that saw popular revolutions topple the governments of Egypt, Libya and Tunisia.
"If we take into consideration the developments in Syria, the events in Libya and other countries, for the leaders of these countries, it's becoming clear that this is not 'Spring' but chaos."
The successful Arab Spring movements inspired the uprising in Syria that began in March 2011 with protests calling for political reforms and quickly devolved into a revolt with an armed opposition amid a brutal crackdown by al-Assad's forces.
The United Nations estimates that at least 9,000 people have died in the 14-month crisis, while opposition groups put the death toll at more than 11,000.
CNN cannot independently verify reports of deaths and violence because the Syrian government has severely restricted access by international media.
Al-Assad blamed the violence on terrorists, including those who labeled themselves members of the rebel Free Syrian Army.
But opposition groups, including members of the rebel army, say al-Assad's government has been trying to mar their efforts with false accusations of links to terrorism.
While the rebel army says its ranks are populated by those who defected from Syria security forces, al-Assad labeled them criminals.
"It's not an army, first of all, and it's not free because they get their arms from different foreign countries," he said in the interview.
"That's why they are not free at all -- they are a bunch of criminals who have been violating the law for years and have been sentenced in various criminal cases. There are religious extremist elements among them, like those from al Qaeda."
Al-Assad dismissed the enormous international pressure put on him to end the violence and step down, vowing that Syria would not bow on any issue.
The United States, the European Union and the United Nations have targeted Syria with a number of economic sanctions targeting al-Assad and his government.
Al-Assad acknowledged the sanctions have had an adverse affect on Syria's economy.
"The world doesn't consist just of Europe and the United States, and we find alternatives which allow us to overcome these difficulties. We can support small and mid-sized business, the basic element of our economy is agriculture, and it's hard to affect it with sanctions," al-Assad said.
Al-Assad also called a boycott of recent parliamentary elections by the opposition a failure.
"It seems to some people that if we conducted the reforms earlier, the situation would have been better now. It's not right for one reason -- terrorists spit on reforms. They are not fighting for reforms, they are fighting to bring terror," he said.
Meanwhile, the U.S. government distanced itself from a Washington Post report that said more and better weapons are making their way in to the hand of Syrian rebels.
The newspaper, citing unnamed officials and opposition activists, reported the arms are being paid for by Persian Gulf nations and coordinated in part by the United States.
"The United States has made a decision to provide nonlethal support to civilian members of the opposition," Victoria Nuland, a State Department spokeswoman told reporters Wednesday.
"...But with regard to any assertions with regard to lethal, we are not involved in that."
CNN's Amir Ahmed and Joe Vaccarello contributed to this report.
