The fighting comes just days after the Trump administration said it would turn its focus to increasing economic pressure — rather than military action — to try to end its war with Iran.

The U.S. military is experiencing a "beyond critical" shortage of advanced missile interceptors in Europe largely driven by President Donald Trump's war with Iran, a U.S. defense official in Europe and a NATO official told The Associated Press, raising concerns about vulnerabilities in NATO countries to a potential Russian attack.