American navy confiscates ammunition from ship headed to Yemen's Houthi rebels in violation of UN ban, ships it to Ukrainian military as continued US aid is in question

After conducting thousands of air raids during its neighbor's civil war that allegedly targeted civilians, Riyadh moves to shore up Sana'a's economy

Tehran says new ambassador Alireza Enayati will be on hand for Tuesday ceremony at compound, shuttered in wake of 2016 attacks on Saudi missions in Iran

Flights to carry detainees between Saudi Arabia and Yemen over three days, as international efforts seek to end long-running conflict between Houthis and Riyadh-backed government

Trip follows landmark, Chinese-brokered announcement that two nations would work toward resuming relations

Riyadh and Houthis reportedly agree on truce to pave way for peace, after hundreds of thousands killed; comes after surprise agreement between Saudis and Iran, which backs rebels

Tehran's Beijing-sponsored pivot towards detente and strategic alliance with Sunni Muslim states presents significant new security challenges for Israel and the US

Tehran says deal with Riyadh will promote efforts to renew ceasefire, lead to inclusive government; since 2014, conflict has become proxy war between the two regional powers

Iranians deny involvement in shipment intercepted last month in Gulf of Oman; US Central Command says vessel was on route historically used by Iranians to illegally traffic weapons

Campaign Against Arms Trade accuses government of contributing to breaches of international law by supplying weapons used against civilians, non-military targets in Yemen