The United States is warning countries like Russia that they will end up on the "wrong side of history", if they continue to support the Syrian government.
The White House is calling for the international community to further isolate the regime of Syrian President Bashar al-Assad and press for a political transition in the country.
Russia and China have both blocked further sanctions at the United Nations.
White House spokesman Jay Carney says the US is working to get Moscow to change its position.
IN: "We are...
OUT: ...Assad regime"
DUR: 15 seconds
CLIP: http://www.fsnradionews.com/feeds/0530syria-carney1.mp3
At a press briefing, Jay Carney said that countries will be judged by the positions they take on Syria.
IN: "Supporting the...
OUT: ...fifteen months"
DUR: 13 seconds
CLIP: http://www.fsnradionews.com/feeds/0530syria-carney2.mp3