Ukraine is forging ahead with early plans for joint weapons production with some international allies, top officials said, while warning yesterday of potential consequences of the US decision to halt some arms shipments promised to help Kyiv fight off Russia’s invasion.

Analysts say Ukraine’s European allies can fill some of the gaps and provide artillery systems. But they don’t possess alternatives to the U.S.-made HIMARS missiles and air defense systems, especially Patriots, which are crucial to help defend Ukrainian cities.

IN RECENT WEEKS Ukraine has endured some of the most intense drone and missile bombardments since the start of Russia’s full-on invasion three years ago. There could scarcely be a worse time for America to halt the delivery of precious air-defence equipment.