Foreign Ministry spokesman Abbas Araqchi said consequences arising from a potential military offensive against Syria would impact the entire Middle East and called out Western countries on their double standards toward terrorists, Iran's government-backed Press TV reported.
"Wherever the terrorists serve Western interests, they support these groups," Araqchi said.
Araqchi said Russia has submitted to the U.N. Security Council documents indicating militants in Syria carried out recent chemical attacks in the country.
U.S. Secretary of State John Kerry said Monday it was "undeniable" that forces loyal to Syrian President Bashar Assad carried out last week's chemical attack in the suburbs of Damascus. He also said additional information about the attack would be released soon.
Syrian leaders have denied the charges, saying the chemical attack was carried out by rebel forces.
"The Islamic Republic of Iran, as a victim of chemical arms, condemns the use of such weapons by any side," Araqchi said.