Warplanes have targeted the compound used by Yemen's President Abdrabbuh Mansour Hadi in the southern port city of Aden, officials and witnesses say.

The officials said anti-aircraft guns returned fire and forced the planes to retreat. Smoke was seen rising from the compound afterwards.

There are conflicting reports about whether the president was inside.

The aircraft are believed to have been flown by forces loyal to the Houthi rebels who control the capital Sanaa.

Earlier, at least five people were killed in intense fighting around Aden's international airport.

Forces allied to Mr Hadi clashed with troops backing the Houthis and former President Ali Abdullah Saleh, after they launched an assault.

The Houthis have taken over predominantly Sunni parts of central and western Yemen in recent months, sparking battles with tribesmen and al-Qaeda in the Arabian Peninsula (AQAP), after advancing from their stronghold in the far north and entering Sanaa in September.