Congolese forces were losing control of the city of Goma on Wednesday after rebel groups backed by Rwanda took over the airport and shared plans to set up a new administration.

The latest fighting has heightened an already dire humanitarian crisis in the region, forcing half a million people from their homes since the start of the year.

Congolese security forces on Tuesday tried to slow the advance of Rwanda-backed M23 rebels who say they have captured Goma after