The offices of the World Food Programme (WFP) were “entered by local security forces” on Sunday morning (Sunday night AEST), a spokesperson for the agency told CNN.

A WFP staff member was detained, they continued, adding that there were reports of detentions elsewhere too.

Al-Rahawi was killed alongside other Houthi officials in a strike on the Yemeni capital Sanaa on Thursday, the head of the Houthis’ Supreme Political Council confirmed, vowing revenge for the attack.

The rebel group regularly launches missiles at Israel, as well as attacks on vessels in the Red Sea, in what it says is revenge for Israel’s offensive in Gaza.

Netanyahu has pledged that the Houthis will “pay a very heavy price for their aggression against the State of Israel.”

“We are doing what no one has done before us, and this is only the beginning of the strikes on senior officials in Sanaa – we will get to all of them,” the Israeli leader told a government meeting on Sunday.

Since 2014, Yemen has been split between a Houthi government which controls Sanaa and much of the north, and a rival but more widely recognised administration in the south.