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