Iranian Backing for the Houthis during the Gaza Strip War: the Seizure of the Al-Sharwa as a Test Case
Iran began transferring large-scale arms shipments to the Houthis in 2009, with the amounts increasing after the Houthi takeover of Sanaa and the coalition established to act against the Houthis led by Saudi Arabia and the UAE in 2014–2015. From Iran's perspective, backing the Houthis enables the Islamic Republic to gain a foothold in the strategic Red Sea region on Saudi Arabia's border and helps strengthen the "resistance axis" against Israel; Since the start of the war in the Gaza Strip in October 2023, five attempts to smuggle weapons and other military equipment to the Houthis, allegedly sent by Iran, have been foiled. The contraband items included components for ballistic missiles, cruise missiles, UAVs, radar devices, and advanced systems for communications, control and signal jamming; On June 27, 2025, Yemeni forces opposed to the Houthis seized the vessel al-Sharwa, which carried more than 750 tons of weapons and military equipment disguised as civilian goods, including hundreds of cruise missiles, anti-aircraft missiles, anti-ship missiles, advanced warheads, and hundreds of UAV engines, along with instruction manuals in Persian; Recorded confessions of the ship's seven crew members revealed the existence of a broad Iran-Houthi smuggling network which began operating in 2013 and spans countries from the Middle East to Africa. The confessions exposed the smuggling routes from Iran to the Houthis and the identities of senior Houthis involved in operating the network who are in contact with the Revolutionary Guards and Hezbollah; Iranian officials denied that Tehran transferred munitions to the Houthis and claimed it was American propaganda intended to divert attention from [alleged] "Zionist crimes"; In ITIC assessment the seizure of the weapons and the exposure of the Iran-Houthi smuggling network indicate Iranian efforts to back the Houthis and suggest there were many other shipments which were not intercepted and did reach the Houthis. Despite the seizure of the al-Sharwa, it can be assumed that Iran and the Houthis will continue their efforts to smuggle weapons through routes that bypass American and Allied monitoring and control measures in the Red Sea. In addition, the use of boats which do not require complex mechanical systems for unloading enables the Houthis to continue their smuggling activities despite Israel's damage to their seaports.
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