Yemeni Houthi fighters and their allies seized a central Aden district on Thursday, striking a heavy blow against the Saudi-led coalition which has waged a week of air strikes to try to stem advances by the Iran-allied Shi’ite group.

Hours after the Houthis took over Aden’s central Crater neighborhood, they marked another symbolic victory by fighting their way into a presidential residence overlooking the neighborhood, residents said.

The southern city has been the last major holdout of fighters loyal to the Saudi-backed President Abd-Rabbu Mansour Hadi, who fled Aden a week ago and has watched from Riyadh as the vestiges of his authority have crumbled. […]