Yemen's Iran-backed Houthi rebels are attempting to build a new advanced medium-range ballistic missile system with the help of Chinese parts, according to a new report released Wednesday by a group that tracks the use of weapons in conflict zones.
The report by the U.K.-based Conflict Armament Research group came as the Houthis, in their ongoing war with Saudi Arabia, are demonstrating remarkable ability to wreak havoc on one of the Middle East’s best equipped militaries.
The weaponry under development could help the group more precisely target the Saudis and Israel. By turning to China, it also appears to be a sign of increasing independence.
The rebels expand their ambition
The Houthis have tried to acquire key parts from Chinese suppliers that could be used to make a version of Iran’s Kheibar Shekan precision-guided missile, according to the report. The Kheibar Shekan has a range of roughly 1,200 miles (2,000 kilometers).
"The local ambition of the Houthis for manufacturing is beyond what was previously assumed," said Fabian Hinz, a senior analyst at Conflict Armament Research, a research outfit specializing in tracing the flow of arms in war zones around the globe. "These types of parts are very specific, and producing them would have required design information related to the missile."
They're "not goods that can be used for a variety of civilian applications," Hinz said.
The Chinese Embassy in Washington didn't respond to a request for comment.
China is a major purchaser of both Iranian and Saudi oil and leveraged its ties with both countries to broker a rapprochement in 2023. It has condemned a series of attacks on Saudi airports by the Houthis and called for a de-escalation in the fighting.
Saudi Arabia and Yemen’s government launched a military campaign last month aimed at driving back the Houthis from the Bab el-Mandeb Strait, a critical Middle East trade route for oil and other goods.
Yemen interdicted key components to building missiles
The Conflict Armament report was based on information released by Yemeni government authorities in July after officials interdicted two shipments that included suspicious equipment.
The shipments originated from China and were intended to be delivered to Hodeidah, a Yemeni port that Israeli officials say has been commonly used by the Iranians as a weapons transfer point. China accounts for the largest share of seized shipments destined for the Houthis, according to U.N. reports.
Components integral to the functioning of a missile were among the parts found in the cargo. They included stabilizing fin cores, rocket motor aft closures with nozzle attachments, and rocket motor igniters.
The cargo also contained phenolic resin, a material used in creating ablative heat shields. These shields protect ballistic missiles from the intense heat associated with atmospheric flight at high supersonic speeds, the report said.
Hinz said that the combination of materials made clear that the Houthis intended to assemble that specific type of Iranian-designed missile.
"This particular type of system is very difficult to smuggle. And you can’t just disassemble and reassemble them," he said.
Houthi weaponry has grown more sophisticated over time
The Houthis rose to prominence more than 20 years ago as an insurgent group armed with Soviet-era and North Korean weapons seized from the Yemeni government's military.
But over the years, the group's access to advanced weaponry has expanded and so has its ability to menace neighbors.
In the current weekslong conflict with Saudi Arabia, the Houthis have fired ballistic missiles and utilized maneuverable warheads and long-range drones. They previously have fired scores of drones and missiles at Israel, more than 1,000 miles (1,600 kilometers) away.
Over the past week, they managed to puncture the kingdom’s stout air defense system with strikes on Riyadh’s international airport that killed at least 18 people.
Iran could find value in redundancy
Iran has been an important supplier of blueprints and components for the Houthis. But procuring parts from beyond Tehran could be crucial for the group.
"Redundancy is an asset, not a liability in military planning," said Benham Ben Taleblu, a senior director of the Iran Program at the Foundation for Defense of Democracies, a hawkish Washington think tank. "With a blockade of Iran in place, the Houthis are diversifying."
The rebels had long received weapons and materials smuggled from Iran. But the shipments have changed and now more often contain components rather than intact weapons.
The group’s arms program has been "increasingly backstopped by a hybrid, global supply chain serviced by a web of participants — including tribally connected smugglers across Yemen and businessmen working from export hubs in eastern China," according to research published earlier this year by The Century Foundation, a Washington think tank.
Security forces aligned with Yemen’s internationally recognized government have repeatedly intercepted missile components and launch equipment at the port of Aden, according to Yemen’s Aden Counter Terrorism Unit.
Yemen experts believe that the Houthis still rely on Iran for more sophisticated components needed to manufacture guided missiles, including navigation and control systems. But the group has expanded its capacity to manufacture and assemble weapons domestically at facilities deep inside territory under their control.
"The Houthis cannot yet manufacture highly complex weapons systems, and … they still rely heavily on Iran for technology and many critical items," The Century Foundation report said. "The group has reached a capability tipping point and can build a significant proportion of some weapons systems using imported components."
Yehoshua Kalisky, a senior researcher at Israel’s Institute for National Security Studies, said that the Houthis’ supply chain historically mirrored that of other Iranian proxies, including Hamas and Hezbollah.
Iran is among the world’s most advanced in ballistic missile development. And both in Gaza and Lebanon, Iran-backed militant groups have smuggled in raw materials, and relied on Iran for more sophisticated components and assembled weapons themselves, he said.
Kristian Ulrichsen, a Middle East fellow at the Baker Institute, said that the Houthis’ growing reliance on Chinese components could have broader implications for politics in the Gulf.
"Now that the situation has really escalated and seen these attacks on infrastructure and airports, we could see more pressure from the Saudis," he said, noting that China is Saudi Arabia’s largest trading partner.