During peace talks , suicide car bomber in Syria kills 32 near mosque , group says . U.N. officials fear bloodshed and mass exodus at one military buildup . He called on the international community , including key government ally Russia , to pressure al-Assad to adhere to the Geneva communique that led to the talks . Comment: Russians `` need to back up ... words with actions , '' U.S. official says . Two warring sides blames each other for the lack of progress in peace talks .
During peace talks , suicide car bomber in Syria kills 32 near mosque , group says . U.N. officials fear bloodshed and mass exodus at one military buildup . Comment: Russians `` need to back up ... words with actions , '' U.S. official says . Two warring sides blames each other for the lack of progress in peace talks .