Israel on Sunday signalled that it would keep up military strikes across its frontier with Syria to prevent any encroachment by Iranian-allied forces, even as the United States and Russia try to build up a ceasefire in the area. <br/><br/>U.S. President Donald Trump and Russian President Vladimir Putin yesterday affirmed joint efforts to stabilise Syria as its civil war wanes, including with the expansion of a July 7 truce in the southwestern triangle bordering Israel and Jordan.<br/><br/>A U.S. State Department official said, Russia had agreed to work with the Syrian regime to remove Iranian-backed forces a defined distance from the Golan Heights frontier with Israel, which captured the plateau in the 1967 Middle East war. Moscow did not immediately provide details on the deal.'<br/><br/>Meanwhile, Prime Minister Benjamin Netanyahu has warned Gaza militants against attacking Israel after the Islamic militant group vowed revenge for the demolition of one of its attack tunnels.