Historic fort among targets hit by airstrikes in Yemen

Saudi-led coalition planes hit several areas across Yemen late on Sunday, including Aden's historical Seera fort, residents told Reuters.

The fort, dating from the Ottoman-era and the latest of Yemen's historical sites to be damaged in the fighting, was partially destroyed, in airstrikes that also targeted the city's international airport, under the control of Houthi militiamen, and allied army forces loyal to former president Ali Abdullah Saleh.

Fighting in Aden between the Houthi-Saleh forces and local resistance units continued, with the locals struggling to resist the Houthi-Saleh advance, as disease spreads through the city.

More than 20 airstrikes are reported to have hit their positions across the country, as the Saudi-led air campaign to oust the Houthis from power in Sanaa, which began on March 26, continues.

Residents in Yemen's western Hajja province, on the Saudi border, reported five air raids on Houthi-Saleh forces.

The border area has been increasingly tense over the past few weeks, with Houthi media publicising cross-border raids by their forces on Saudi army posts across the border in Saudi Arabia's Jizan and Najran provinces.

The Houthis entered Sanaa in September, and effectively carried out a coup in February. Yemen's president Abd-Rabbo Mansour Hadi and much of the internationally-recognised government have fled to the Saudi capital Riyadh.

UN-brokered talks in Geneva broke down on Saturday, with both sides refusing to even sit in the same room.