Israel says it “will not allow” Iran to build up a long-term military position on its borders, according to Prime Minister Benjamin Netanyahu.

Netanyahu delivered the warning to Russia, which has been Iran’s partner in backing Syrian President Bashar Assad, during a meeting in Tel Aviv on Tuesday. The talks occurred as coalition forces are nearly finished liberating the Islamic State’s capital of Raqqa as key world powers try to secure long-term strategic gains out of the Syrian civil war.