Russia's foreign minister on Wednesday defended his country's sale of arms to Syria and accused the United States of supplying rebels with weapons to fight against the government.
U.S. Secretary of State Hillary Clinton said on Tuesday Washington was worried Russia may be sending attack helicopters to Syria and described as "patently untrue" Moscow's argument that its arms transfers to Syria are unrelated to the conflict there.
"We are not violating any international law in performing these contracts," said Sergei Lavrov, in response to a question about Clinton's comments at a news conference during a visit to Iran.
"They are providing arms and weapons to the Syrian opposition that can be used in fighting against the Damascus government," he said on Iranian state television, speaking through an interpreter.
Lavrov said Russia's position was based on concern for the Syrian people and the country's integrity, rather than personal preference for Assad.
"I have announced time and again that our stance is not based on support for Bashar Al Assad or anyone else ... We don't want to see Syria disintegrate."
Iranian Foreign Minister Ali Akbar Salehi said the Syrian crisis could not be resolved by external powers.
"The Islamic Republic of Iran has announced many times: the issue of Syria needs to be dealt with in Syria by Syrians, not through the interference of others."
The United States says it does not believe Iran, Assad's closest regional ally, is ready to play a constructive role in Syria.