Sudan and Ethiopia will hold negotiations next week to delineate their shared border, a statement from Sudanese Prime Minister Abdalla Hamdok’s office said on Sunday.

The talks will be held on Tuesday; a week after Ethiopian forces reportedly ambushed and killed Sudanese troops along the border.

“Hamdok and his Ethiopian counterpart Abiy Ahmed on Sunday discussed the meeting of the committee for delineating the borders which will be held on December 22,” the statement said. The two leaders met on the margins of a summit under way on Sunday in Djibouti of the Intergovernmental Authority on Development (IGAD), an East African regional bloc comprising eight countries. Hamdok is the current head of the IGAD.

A cross-border attack by Ethiopian forces and rebels last Tuesday killed at least four Sudanese troops and wounded a dozen others in the Abu Tyour area in eastern Sudan’s Gadarif province.

Sudan’s state-run news agency SUNA on Saturday said its military had deployed “large reinforcements” into the province to reclaim territories controlled by Ethiopian farmers and rebels in Sudan’s al-Fashqa border area.