According to Al-Maydeen television, Saudi troops fired more than 20 mortar shells and rockets at Sa'ada and Hajjah on Sunday.
The Saudi troops also fired artillery shells at "Faj Harad" district in Hajjah.
Saudi Arabia launched its bombing campaign against Yemen on March 26 in an attempt to restore power to fugitive President Mansour Hadi, a staunch ally of Riyadh.
Hadi stepped down in January and refused to reconsider the decision despite calls by Ansarullah revolutionaries of the Houthi movement.
Despite Riyadh's claims that it is bombing the positions of the Ansarullah fighters, Saudi warplanes are flattening residential areas and civilian infrastructures.
The Monarchy's attacks have so far claimed the lives of at least 3,812 civilians, mostly women and children.
On April 21 and May 12, Saudi Arabia declared end to Yemen airstrikes after weeks of bombings, but airstrikes are still underway.
The five-day truce was proposed by Saudi Foreign Minister Adel al-Jubeir last week. Yemen’s Ansarullah movement has announced its cooperation in any actions that will stop suffering in the country.
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