ABOARD A US MILITARY PLANE (AP) — The Trump administration is urging Europe to impose tough new sanctions on Iran over its ballistic missile program.

The U.S. and others condemned an Iranian missile launch over the weekend.

U.S. special envoy for Iran Brian Hook rejected Iran’s insistence that its missile program is defensive. He told reporters traveling to Brussels with Secretary of State Mike Pompeo that Iran’s missile development and testing is a threat and in defiance of U.N. Security Council demands.

Hook’s comments Monday were the latest salvo in an escalating U.S. campaign against Iran since President Donald Trump pulled out of the 2015 nuclear deal in May.

On Thursday, Hook accused Iran of violating U.N. ban on Iranian arms exports by sending weapons to its proxies in Afghanistan, Iraq, Lebanon, Syria, and Yemen.