The US has moved to delist Yemen’s Huthi rebels as a terrorist organization, removing a block that humanitarian groups said jeopardized crucial aid as the country’s warring sides cautiously welcomed a push for peace by President Joe Biden. The grinding six-year war in Yemen has killed tens of thousands and displaced millions, triggering what the United Nations calls the world’s worst humanitarian disaster. A State Department spokesperson said Friday they had “formally notified Congress” of Secretary of State Antony Blinken’s intent to revoke the terrorist designations. The move, which will take effect shortly, comes a day after Biden announced an end to US support for the Saudi-led offensive operations in Yemen. “This decision has nothing to do with our view of the Huthis and their reprehensible conduct, including attacks against civilians and the kidnapping of American citizens,” the spokesperson said. “Our action is due entirely to the humanitarian consequences of this last-minute designation from the prior administration,” they said, adding the US remained committed to helping Saudi Arabia defend its territory against attacks by the rebels. Blinken’s predecessor Mike Pompeo announced the designation days before leaving office last month, pointing to the Huthis’ links to Iran, an arch-enemy of Trump, and a deadly attack on the airport in Yemen’s second city of Aden in December. Aid groups say they have no choice but to deal with the Huthis, who are the de facto government in much of Yemen, and that the terrorist designation would put them at risk of prosecution in the United States. According to the UN, more than three million people have been displaced and close to 80 percent of Yemen’s population of 29 million people need of some form of aid for survival. Cautious optimism Biden on Thursday announced the withdrawal of US support for the Saudi-led offensive in his first major foreign policy speech since replacing Donald Trump. Yemen’s internationally recognised government, which is backed by a Saudi-led military coalition, welcomed his remarks and stressed the “importance of supporting diplomatic efforts to resolve the crisis”. It hailed the appointment of Timothy Lenderking as US envoy, describing it as “another important step” taken by the US to “end the war caused by the Iran-backed Huthis”. The Huthi rebels also welcomed the approach of the new US administration. “We are cautiously optimistic,” Huthi official Hameed Assem told AFP on Friday. But he also warned that “our missiles will not stop until there is a ceasefire… they are the ones who started the war, and they are the ones who should end it.”