Two hundred people have been killed since Houthi rebels overran the city of Amran on Tuesday.
Sunni tribes and religious leaders have asked their followers to join the fight against the Houthis whom they accuse of colluding with Iran to create a Shia state in Yemen. 35,000 people have fled fighting in Yemen.
Al Jazeera's Hashem Ahelbarra reports.
Source: Al Jazeera