Clashes between Yemen's Houthis and Sunni militias have continued in the capital, Sanaa, killing four people and leaving three hurt.

Several homes and a hospital were struck by mortar fire on Saturday.

The Shia group's advance on the capital has left scores dead this week and damaged many key buildings.

The showdown between the Houthis and forces loyal to the main Sunni party, Islah, has triggered Yemen's worst crisis since 2011.

The violence came as it emerged that a deal between the rival groups was under discussion.

One presidential source told a BBC Arabic correspondent in Sanaa that the Houthis - an armed Shia grouping - had signed a draft agreement proposed by President Abdrabbuh Mansour Hadi.

No confirmation was available, and details of any discussions were limited.

Much of the violence on Saturday was in the northern part of the capital, where the rebels tried to seize control of the Iman University from fighters loyal to Islah.

The capital's international airport remained closed for a second day. Hundreds have fled their homes.

(BBC)