A humanitarian aid office in northern Yemen was struck by mortar shells on Thursday, killing five and injuring ten, Reuters reports.
The five dead were all Ethiopian refugees.
Saudi officials have not confirmed the incident.
Saudi Arabia has been conducting airstrikes on Houthi targets in Yemen in a bid to restore power to President Abd Rabbuh Mansur Hadi, who is currently residing in Riyadh.
More than 6,000 Yemenis have been killed since the start of the airstrikes on March 26.
Rival factions will participate in UN-led talks, set to begin on May 28 in Geneva.
