Ethiopia's decision to fully accept and implement a peace deal which should see it hand disputed territories to Eritrea is "undemocratic", a member party of the coalition has said.

The government announced its intention to accept the 2002 border commission ruling, which awarded disputed territories, including the town of Badme, to Eritrea, earlier this month, hoping to end a dispute with its neighbour which sparked Africa's deadliest border war in 1998.

But the Tigray People's Liberation Front (TPLF) has accused the government of making the decision "without the involvement of ally organisations".

Tigray is the region which borders Badme and the TPLF was for many years the dominant partner in Ethiopia's ruling EPRDF coalition.

In a statement, the TPLF said the government was "wrong" to have made the public announcement. It also accused Ethiopia's new Prime Minister Abiy Ahmed of failing to "recognise our veteran leaders".

Mr Abiy is from the Oromo Peoples' Democratic Organization (OPDO), another of the four parties which make up the EPRDF.