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 . The heightened tensions come amid questions over possible chemical weapon use in Syria and international debate over how to respond to the country 's bloody civil war , in which more than 70,000 people have died in more than two years of fighting . 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 : 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 .