Since July, more than 200,000 people have fled into camps following ethnic conflict on the border of Ethiopia's Oromia and Somali regions, aid group Norwegian Refugee Council (NRC) says.

Most of those in the camps come from the Oromia region.

"Few aid groups are present, and more families arrive every day while resources are overstretched.

"Elders tell us people are dying for lack of aid. These families need lifesaving aid, before it’s too late,” NRC regional adviser Evelyn Aero said.

The NRC says the total number of the displaced by the conflict is now 700,000.

Abdirahman Moalim, a farmer who fled eastern Oromia last year, told the aid charity: “We fled the violence with only the clothes on our back”.

The former governor of the Somali region, Abdi Mohamed Omar, who was forced to resign in August, is facing charges of human rights abuses during his 13 years in power.

He denies any wrongdoing.