The call came following recent deadly clashes over ownership of Aneet market.
The clashes have resulted in the loss of many lives, injuries to scores of people, the burning down of homes and properties, and the mass displacement of thousands of civilians on both sides.
Nicholas Haysom, Special Representative of the Secretary-General in South Sudan and head of UNMISS, urged communities in Abyei and in Warrap to embrace peace.
“We urge leaders and authorities from both communities in Abyei and in Warrap State to work expeditiously to put an end to these violent clashes, and also prevent any retaliatory attacks,” Haysom said in a statement issued on Friday.
Haysom said the Mission remains gravely concerned about the hostilities, which started in February this year over the disputed border, with a lull in June, but saw a violent resumption in late September.
“Any disputes over the border must be resolved by the appropriate national institutions, and order must be restored quickly to facilitate the free movement of people, goods, and humanitarian assistance,” said Haysom.
He said the mission has embark on mission to some parts of Twic county to engages the authorities, youth and women leaders, as well as other leaders, to bring an end to these hostilities.
He urged the government to launch an investigation into the clashes and to deploy troops to the area to restore peace and order.
In February, fighting erupted at Aneet market in Abyei Administrative Area over land disputed by the two communities.