Civilian casualties grow as battle for Yemeni city intensifies

At least 29 people killed on Sunday in rebel missile strike in escalating fight for control of Marib

More than 100 civilians in the Yemeni province of Marib have been killed or injured in the past month as fighting rages for the country's last major government-loyal stronghold.

Marib city has been under sustained attack since the beginning of the year from Houthi rebels, whose forces have steadily closed in on the central desert area on three different fronts.