Ten people were killed in air strikes on Thursday by the Saudi-led coalition in Yemeni cities of Sanaa and Saada, pro-Houthi security officials said.
Officials said the attacks also hit eight other provinces.
Houthi-controlled Ministry of Interior did not specify whether those killed were civilians.
The coalition air strikes targeting the capital Sanaa killed 8 people, officials said.
Warplanes also pounded the northern Saada province early on Thursday, concentrating on military bases.
The latest strikes on Saada killed two people and wounded 15, Houthi-run Saba news agency reported.
A Saudi-led coalition began launching air strikes against the rebel forces on March 26.
The rebel forces include Houthis and forces loyal to former Yemeni president Ali Abdullah Saleh.
The Houthis, supported by Iran, seized the capital Sanaa in September 2014, driving the president Abd Rabbuh Mansour Hadi out of Yemen to the Saudi capital, Riyadh.
The coalition says their aim is to restore President Abd Rabbuh Mansour Hadi to power.
Among the coalition members are Bahrain, Egypt, Jordan, Kuwait, Morocco, Qatar, Sudan and the United Arab Emirates, with the UK and US giving logistics and diplomatic support.
On Tuesday, Human Rights Watch (HRW) said the Saudi-led air strikes killed 59 people, including at least 35 children, in Saada during a ceasefire between May 15-16.
Yemen is the poorest country in the Middle East with over 20 million people in need of aid.
More than 2,800 people have been killed in the past three months and the fighting has displaced more than 1 million people, according to the UN.