Yemen's Houthi movement has threatened to escalate after US strikes killed 31 people, mostly women and children, in response to the group's threat to resume Red Sea shipping attacks. The strikes have triggered a diplomatic backlash from Russia and Iran. The Houthis described the attacks as a 'war crime' and vowed to respond with 'escalation'. In response, President Donald Trump warned Iran to end support for the group, while the top commander of Iran's Revolutionary Guards said Iran would respond decisively to any action against it. Russia called for an immediate cessation of the strikes and for political dialogue to take place.