ADDIS ABABA, Aug 14 (Reuters) - Ethiopia appealed again on Friday to the Organisation of African Unity (OAU) and international community to put pressure on its neighbour Eritrea to end a border dispute peacefully.

The ministry of foreign affairs said in a statement that the ``new round of prevarication by the Eritrean authorities should not be tolerated.

``Clearly what Eritrea is trying to do is to scuttle yet another effort by the OAU at peacemaking as it did to the U.S.- Rwanda peace initiative and to all others...who tried to help,'' the statement said.

It said Eritrea had changed tack following a judgement by the OAU ministerial committee dealing with the crisis that the contested Badme area was under the Ethiopian administration before the border conflict broke out in early May.

The statement said Eritrean President Isayas Afewerki later told a committee of African heads of state that Eritrean forces ``had always been in Badme, that they are there to stay, and should not be asked to withdraw from their own territory.''

``In the face of incontrovertible evidence that conclusively affirmed that Badme has been administered by Ethiopia, the OAU and all others concerned should find a peaceful solution to the Ethiopia-Eritrea crisis,'' the statement added.

An earlier peace initiative brokered by the United States and Rwanda stumbled when Eritrea refused to withdraw troops from the disputed territories before negotiations took place.

The Ethiopian foreign ministry statement said evidence which established Badme was administered by Ethiopia included:

- Six Ethiopian elections were held in Badme area between June 1992 and February 1996.

- An elected member of parliament from Badme sits in the Ethiopian parliament.

- Badme had an Ethiopian local, district and municipal government, a judiciary, peasants and local associations, police, a school and health centres.

Meanwhile, Ethiopia said on Friday that it has served notice to some 87 Eritreans working in international organisations in Addis Ababa to leave the country by next month.

Government spokeswoman Selome Taddesse said those who are asked to leave are those considered to be a threat to national security. Selome said the government has established a committee that looks into their cases if they have any complaints.

Eritrea and Ethiopia have made repeated allegations of ill-treatment of their nationals in each others' countries over the last two months, ever since the violent border conflict turned into a bitter war of words.

Eritrea has agreed to allow United Nations human rights experts to investigate accusations of mistreatment of Ethiopian nationals on its soil, the head of the U.N. mission in Eritrea said on Friday.

Four human rights investigators are expected to arrive in the Eritrean capital Asmara in the next few weeks, Martyn Ngwenya, the U.N.'s resident coordinator, told Reuters.

``We have justified the deployment of four human rights monitors here because of the accusations and counter accusations being made by the two parties to the war,'' Ngwenya said.

The Organisation of African Unity (OAU) will pay part of the cost of the monitors, he added.

Six investigators were also assigned to work in Ethiopia, but there there was no confirmation on whether the Ethiopian government had agreed to their introduction.