This killed 31 people at the start of a campaign expected to last many days.

Trump also warned Iran, the Houthis’ main backer, that it needed to immediately halt support for the group. He said if Iran threatened the US, “America will hold you fully accountable and, we won’t be nice about it.”

The unfolding strikes which one US official told Reuters might continue for weeks,  represent the biggest US military operation in the Middle East since Trump took office in January.

It came as the US ramped up sanctions pressure on Tehran while trying to bring it to the negotiating table over its nuclear program.

“To all Houthi terrorists, Your time is up, And your attacks must stop, Starting today. If they don’t stop, Hell will rain down upon you like nothing you have ever seen before,” Trump posted on his Truth Social platform.

Thirty-one were killed and 101 others injured in the US strikes, mostly from women and children, Anees al-Asbahi, Spokesperson for the Houthi-run Health Ministry said in an updated toll on Sunday.

The Houthis’ political bureau described the attacks as a “war crime.”

“Our Yemeni armed forces are fully prepared to respond to escalation with escalation,” it said in a statement. Residents in Sanaa said the strikes hit a building in a Houthi stronghold.

--Reuters--