The leader of the Houthi group which seized control of Yemen's capital last month called on Wednesday for a mass protest in Sanaa on Thursday against the appointment of a new prime minister, which he said had been dictated by the United States. Abdulmalik al-Houthi warned in his televised speech that the protest would be accompanied by unspecified steps 'to contribute to correcting this mistake' and appealed to President Abd-Rabbu Mansour Hadi to reconsider the appointment.