A Saudi-led coalition has resumed air strikes against Houthi rebels in Yemen after a five-day ceasefire ended, Yemeni officials and witnesses say.

Aircraft targeted rebel positions in the southern city of Aden overnight, despite a UN call for the truce to be extended to allow in more aid.

Yemeni parties are in negotiations in Saudi Arabia on how to end the crisis.

But the rebels, who reject the return of exiled President Abdrabbuh Mansour Hadi, are boycotting the talks.

Mr Hadi fled the country at the end of March after rebel forces and allied army units loyal to ousted former president Ali Abdullah Saleh advanced on Aden.

He had taken refuge in the city the previous month after the Houthis consolidated their control of Sanaa and placed him under effective house arrest.
'Avoid airports, infrastructure'

The new UN envoy to Yemen opened talks with the country's various factions in the Saudi capital on Sunday urging all sides to "renew their commitment to this truce for five more days at least".

Ismail Ould Cheikh Ahmed also said they should "refrain from any action that disturbs the peace of airports, main areas and the infrastructure of transport".

Despite the appeal, coalition air strikes reportedly resumed after the ceasefire expired at 23:00 (20:00 GMT) on Sunday, with warplanes bombing the rebel-held presidential palace in Aden on Monday, as well as the city's international airport.

He had taken refuge in the city the previous month after the Houthis consolidated their control of Sanaa and placed him under effective house arrest.
'Avoid airports, infrastructure'

The new UN envoy to Yemen opened talks with the country's various factions in the Saudi capital on Sunday urging all sides to "renew their commitment to this truce for five more days at least".

Ismail Ould Cheikh Ahmed also said they should "refrain from any action that disturbs the peace of airports, main areas and the infrastructure of transport".

Despite the appeal, coalition air strikes reportedly resumed after the ceasefire expired at 23:00 (20:00 GMT) on Sunday, with warplanes bombing the rebel-held presidential palace in Aden on Monday, as well as the city's international airport.

BBC