Clinton blasts Russia, says support for Syrian regime could lead to ‘civil war'

— -- Secretary of State Hillary Clinton bluntly warned Russia on Thursday that its support for Syria's Bashar al-Assad could help trigger a "catastrophic" civil war in Syria that risks spilling across the Middle East with devastating consequences.

"My argument to the Russians is — they keep telling me they don't want to see a civil war, and I have been telling them their policy is going to help contribute to a civil war," Clinton said in an interview with Denmark's TV2 during a visit to Copenhagen.

Russia — along with China — has blocked U.N. Security Council support for an Arab League plan to end Assad's bloody 15-month crackdown on opposition to his regime. The United Nations estimates that some 13,000 have died in the violence.

"The Russians keep telling us they want to do everything they can to avoid a civil war because they believe that the violence would be catastrophic," Clinton said at a press conference with Danish Foreign Minister Villy Sovndal.

"They are just vociferous in their claim that they are providing a stabilizing influence.  I reject that.  I think they are, in effect, propping up the regime at a time when we should be working on a political transition," the top American diplomat charged.

Clinton's remarks could foreshadow a combative tone for President Barack Obama's planned meeting with Russian President Vladimir Putin on the sidelines of a G20 summit in Mexico June 18-19.

In Washington, U.S. officials pressed Moscow to halt any military shipments to Assad's government. "We believe that all countries should cease any and all military assistance with Assad's regime and we've repeatedly expressed those concerns with Russian officials both publicly, as I'm doing now, and privately," State Department spokesman Mark Toner told reporters Thursday.

The sharp escalation in Washington's pressure on Moscow to help end the bloodbath in Syria came as the White House accused Iran of "malignant behavior" by supporting the government in Damascus.

Obama's press secretary, Jay Carney, warned that time was running short for a peaceful, negotiated transition that eases Assad from power.

"The longer this goes on, the longer that Assad and his thugs are allowed to brutally murder the Syrian people, the more likely it becomes a sectarian civil war; the more likely that it spills over Syrian borders; the more likely that it transforms into a proxy war with different players, including, of course, Iran, which is already engaging in malignant behavior with regards to the Syrian situation, stepping up that kind of activity," he told reporters.

News of fresh atrocities like the reported massacre of civilians in Houla "horrifies" Obama but also "bolsters his resolve" to find a way to end the violence in Syria, Carney said.

"The brutality exhibited by Assad will surely doom him in history as a tyrant and a human rights violator and the worst kind of leader imaginable for any people," the spokesman said.

At the same time, "there is no question that as mighty as the United States is, that we cannot end all atrocities around the globe," Carney said.

Washington has said it will not provide arms to Syria's rebels but has effectively given the green light for other countries — notably Gulf nations — to do so.