At the 2018 Russia–United States summit in July 2018, U.S. President Donald Trump and Putin agreed to cooperate in Syria to ensure Israel's security. U.S. National Security Advisor John R. Bolton later claimed that both Israel and Russia sought the withdrawal of Iranian forces from Syria. Russia later offered to create a 100 kilometre buffer zone on the Syrian side of the Israel-Syria border which Iranian troops would be barred from, though this offer was rejected by Israel.