The coalition said any steps that contradict the Riyadh agreement should be canceled, and it called for an end to any escalation in Yemen.
On Sunday, the United Arab Emirates-backed STC announced emergency rule in Aden and all southern governorates, a move which Yemen's foreign minister Mohammed Al-Hadhrami described as a "resumption of its (STC's) armed insurgency and rejection and complete withdrawal from the Riyadh agreement."