整理：中东局势跟踪（4月18日）

Conflict Situation - Israeli military claims to have attacked Hezbollah positions [1] - Hamas leader in Gaza states that the organization rejects temporary ceasefire agreements, indicating that the release of Israeli hostages is contingent upon Israel's agreement to end the war and fully withdraw from Gaza [2] Other Developments - Israeli Prime Minister Netanyahu asserts that Israel will not allow Iran to acquire nuclear weapons [3] - Saudi Defense Minister met with Iran's Supreme Leader in Tehran, indicating potential diplomatic engagement [3] - The U.S. Treasury has placed Yemen International Bank on its sanctions list [3] - The U.S. has begun withdrawing hundreds of soldiers from northeastern Syria [3] - IAEA Director General Grossi is in contact with Washington to explore how the agency can assist in advancing nuclear negotiations between Iran and the U.S. [3] - Israeli military claims to have killed a senior member of Hezbollah [3] - Houthi forces report that U.S. military conducted at least three airstrikes in Yemen's Bayda province [3] - U.S. military confirms attacks on fuel platforms in the port of Ras Isa, Al Hudaydah, Yemen [3]