At least six explosions struck Thursday near the palace used by Yemen's legitimate government in the port city of Aden, witnesses said. An official said at least two people were killed, and Iran-backed Houthi militants based in northern Yemen quickly claimed responsibility. It was a rare attack on the palace area, as fighting has escalated between the militia and a Saudi-led coalition in the latest front in the Iran war. The explosions caused panic among residents, who fled the area.