The United Nations force monitoring a hotly contested border between Eritrea and Ethiopia voiced concern Thursday over gunshots fired from within a safe buffer zone, according to DPA. The UN Mission in Ethiopia and Eritrea (UNMEE) said its observer team heard firing sounds in the border area Wednesday and notified the neighbouring arch-enemies about the incident, both of whom acknowledged the occurrence. The Eritrean information ministry placed blame squarely on Ethiopia. "UNMEE expresses concern about this firing incident between Ethiopia and Eritrea and is calling on both parties to show maximum restraint," the mission said in a statement.