The attack signals a new escalation in tensions between the kingdom and the separatist forces of the Southern Transitional Council, which is backed by the Emirates.

Saudi-led coalition warns UAE-backed separatists of immediate action to protect civilians and uphold de-escalation in Yemen.

DUBAI: Saudi Defense Minister Prince Khalid bin Salman called on the Southern Transitional Council (STC) to respond to Saudi-Emirati mediation efforts and de-escalate tensions in…