A suspension in Patriot missiles is a body blow to the embattled county’s efforts to withstand Russia’s increasingly deadly and mounting aerial assaults.

Demand for Patriot air defense systems and their interceptor missiles is "growing significantly," a RUSI research fellow said.

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.