The Yemeni government has said that it has halted military operations against the Houthi fighters to allow aid to reach civilians trapped in the conflict zone.
Up to 150,000 people are said to have been forced from their homes by intense fighting and are in need of urgent assistance.
It was unsure, however, whether the truce would hold as the conflict between the Houthi group and the government has been going on for five years, and mistrust between both sides is deep.
Al Jazeera's Hashem Ahelbarra reports from the capital, Sanaa.