RIYADH: The Arab coalition said on Tuesday it had observed “hostile activity” by the Houthi militia in Yemen"s capital Sanaa. It added that the Houthis must immediately stop its activities and evacuate its camps and bases in Sanaa. It also said it was monitoring the Houthis’ activity, adding that if they did not comply with the evacuation order, it would carry out strikes on its locations in accordance with international humanitarian law. The coalition also revealed details of the recent operation it carried out against the Houthis, saying: “We destroyed a weapons depot in a camp and we will destroy any activity for the transfer and movement of weapons.” Later, the coalition said it had destroyed a hostile air defense system on the Marib front.