Warplanes of the Saudi-led coalition in Yemen hit a bus carrying factory workers in Taiz on Thursday, killed 10, medics said.
The incident took place as battles continue between the Saudi-led coalition and Houthi rebels in the capture of Taiz, Yemen’s third largest city.
The alliance denied responsibility for the attack. No respond for comment from the alliance, Reuters said.
For the last 7 months, strong clashes have been taking place in Yemen, between the Iranian-backed Houthi militias and the Saudi-led coalition.
Saudi Arabia set up the coalition to restore the legitimacy of the Yemeni President, Abd Rabbu Mansour Hadi and started to carry out air strikes against the Houthi militants in Yemen in March 2015.
The Iranian-backed Houthis are allied with the forces loyal to the former President, Ali Abdullah Saleh and they are fighting against the Saudi-led coalition.
Taiz is one of the largest cities in Yemen and in the recent weeks it has witnessed severe clashes that have caused a lot of damage and forced thousands of Yemenis to feel the area.
At least 5,600 people have been killed over the last six months in Yemen.
Some 2,600 of them were civilians, the office for the UN high commissioner for human rights has said on Tuesday.
Rupert Colville, OHCHR spokesman, said about two-thirds of the civilian deaths were caused by coalition air strikes, and the rest by Houthis.