Talks between Sudan, Egypt and Ethiopia in the Democratic Republic of Congo over the Nile dam row have collapsed, Sudan's private Al-Intibaha newspaper reports.

The countries failed to reach an agreement following days of negotiations in the DR Congo capital Kinshasa, with the Sudan delegation reportedly departing to Khartoum shortly after.

Sudan accuses Ethiopia of "intransigence" as the latter prepares to carry out a second filling of the dam.

But Ethiopia's Foreign Minister Demeke Mekonnen accused Sudan and Egypt of obstructing the talks and having a "rigid stance", according to a statement published by pro-government Fana website.

Mr Demeke added that talks are expected to resume in the third week of April and maintained that they should be held under the auspices of the AU.

Ethiopia has rejected a request by Sudan and Egypt on a negotiation team involving the UN, US, EU and African Union (AU).

Decade-long negotiations between the three countries have failed to reach a final agreement on the filling and operation of the dam - which Ethiopia says is critical for development.

Sudan and Egypt have however raised concerns that the dam threatens their water supply.