At least 39 people were killed and dozens wounded in 24 hours of clashes in the southern Yemeni cities of Aden and Dhaleh, officials said. In Aden, Yemen's second city, seven civilians died and 94 were wounded after Huthi rebels fired rockets on neighbourhoods controlled by troops loyal Saudi Arabia. The fire destroyed several houses, according to Aden vice-governor Nayef al-Bakri. Further north in Dhaleh, fierce clashes between Huthi fighters and loyalist troops killed 24 rebels and eight in the pro-Hadi camp, including a local commander, a local official said. Both camps used heavy weapons after the rebels attacked pro-government positions in the northern and eastern areas of the city, the official said, adding that there were dozens of wounded on either side. Fighting has dragged on for several months in Aden, where rebels have battled pro-Hadi loyalists since the president fled to Riyadh in March. A Saudi-led coalition has been pounding rebel positions in Yemen since March 26, following a Huthi advance from their northern stronghold into the capital Sanaa, and a subsequent push south towards Aden.