U.S. Secretary of State Hillary Clinton warned Russia that its support for Syrian President Bashar al-Assad’s regime will have negative consequences for it, RIA Novosti reported.

“The situation is spiraling towards civil war, and it's now time for everyone in the international community, including Russia and all Security Council members, to speak to Assad with a unified voice and insist that the violence stop, and come together with Kofi Annan to plan a political transition going forward,” Clinton said on Wednesday, June 13 at a joint press conference with Indian Foreign Minister Somanahalli Mallaiah Krishna after a meeting with him.

“It is something that we believe is in everyone’s interests, most particularly the Syrian people. And Russia says it wants peace and stability restored. It says it has no particular love lost for Assad. And it also claims to have vital interests in the region and relationships that it wants to continue to keep. They put all of that at risk if they do not move more constructively right now,” she said.

Clinton also urged Russia to stop arms deliveries to Syria. “We have repeatedly urged the Russian government to cut these military ties completely and to suspend all further support and deliveries,” she said.

Clinton earlier claimed that Russia supplies attack helicopters to Syria, but Russian Foreign Minister Sergei Lavrov on Wednesday denied the claims saying Russia was “completing the implementation of contracts that were signed and paid for a long time ago” and adding that the contracts "concern exclusively anti-aircraft defense.”

Syria is one of Russia’s major weapons clients, and Moscow has opposed proposals for an arms embargo on Damascus, saying this would give rebel forces an unfair advantage in the conflict. Lavrov also said Russia does not supply to Syria or other countries any special equipment that may be used against peaceful demonstrators, adding that the United States, on the contrary, “delivers riot control equipment to the region.”

Clinton dismissed claims that the United States armed Syrian opposition.

“I would emphasize that the United States has provided no military support to the Syrian opposition, none. All of our support has been medical and humanitarian to help relieve the suffering of the Syrian people, a total of $52 million so far. We have also provided nonlethal support to the opposition, including things like communications gear,” she said.