NEW : Israeli prime minister : Israeli `` aggressions ... have left no room for hesitation '' There is no information suggesting rebel use of sarin , a State Department official says . Syria conducted airstrikes in Syria on Sunday and last week , a Israel official tells the Russian Foreign Ministry . Reports of Israeli strikes are `` very worrying , '' State Department says .
NEW : Syrian prime minister : Israeli `` aggressions ... have left no room for hesitation '' There is no information suggesting rebel use of sarin , a State Department official says . Israel conducted airstrikes in Syria on Sunday and last week , a U.S. official tells CNN . Reports of Israeli strikes are `` very worrying , '' the Russian Foreign Ministry says .