Warplanes from the Saudi-led Arab coalition struck two Houthi camps east of the Yemeni capital Sanaa on Sunday, shortly after a three-day truce expired.
The raids targeted al-Hafa and al-Nahdayn camps east of Sanaa, according to eyewitnesses.
Billows of black smoke were seen rising from the pounded sites.
No information was yet available about casualties.
Sunday’s airstrikes came shortly after a three-day truce between Houthi rebels and the Saudi-led coalition ended without a renewal.
Yemen has been racked by chaos since late 2014, when the Houthis and their allies overran Sanaa and other parts of the country, forcing members of Yemen’s Saudi-backed government to temporarily flee to Riyadh.
Earlier this month, the U.S. directly intervened in the conflict — for the first time — with a cruise missile strike on Houthi targets on the coastal province of Al-Hudaydah.