US President Donald Trump has re-designated Yemen’s Houthi movement, known formally as Ansar Allah, as a “foreign terrorist organization”, Reuters quotes the White House as saying.

The move will impose harsher economic penalties than the Biden administration had applied to the group in response to its attacks on commercial shipping in the Red Sea and against US warships defending the critical maritime chokepoint.

Proponents of the move say it is overdue, though some experts say it could have implications for anyone seen as aiding the Houthis, including some aid organisations.

“The Houthis’ activities threaten the security of American civilians and personnel in the Middle East, the safety of our closest regional partners, and the stability of global maritime trade,” the White House said in a statement.

Under the Biden administration, the US military sought to intercept Houthi attacks to safeguard commercial traffic and waged periodic strikes to degrade Houthi military capabilities. But it did not target the group’s leadership.