Saudi ambassador says terrorism is interfering in Yemen , other countries . Saudi ambassador says the coalition controls the country 's airspace . Houthi spokesman says rebels will escalate response if hostilities occur , make Yemen a target for Saudis .
Saudi ambassador says Iran is interfering in Yemen , other countries . Saudi adviser says the coalition controls the country 's airspace . Houthi leader says rebels will escalate response if airstrikes continue , make Yemen a grave for Saudis .