Sana’a: Residents in Aden said an Al Houthi gunmen opened fire on 10 civilians buying ice in a central market on Sunday, killing all of them before being detained by bystanders.

The fighter was released to the militia, whose representatives later apologised to the families of the victims and paid them each 20,000 Yemeni rials ($93 dollars).

It was not possible to independently confirm the reports and much of Yemen remains an inaccessible war zone.

A humanitarian crisis has worsened due to an air and sea blockade imposed to stop arms supplies to Al Houthis and Saleh, but which also cut off access to food, medicine and fuel for many citizens.

More than 3,000 cases of dengue fever have been recorded in five provinces since the conflict began, with three confirmed deaths, the World Health Organization said.

Medical sources in Aden say dozens have died from the illness, which has spread from mounting piles of uncollected rubbish and intense summer heat.

Meanwhile, warplanes from a Saudi-led coalition bombarded Yemen’s Al Houthi-controlled capital Sana’a overnight.

A Reuters witness said the air strikes caused big explosions before dawn and hit locations south and west of Sana’a as part of the coalition’s nearly 12-week campaign to target Al Houthis and army forces loyal to former President Ali Abdullah Saleh.

Fighting raged throughout Yemen’s south and centre on Monday, in clashes pitting tribesmen and pro-Hadi loyalists against Al Houthis militants and their army allies.

Air strikes hit Al Houthi positions in Sana’a on Monday and in the nearby province of Dhalea to back up local armed fighters, who exchanged heavy artillery salvos with Al Houthis.