The United Nations Security Council has voted unanimously Monday to extend for six months a peacekeeping mission on the border between Ethiopia and Eritrea.

The council also called on Ethiopia and Eritrea to show maximum restraint and refrain from any threat or use of force against each other.

The two nations have long-standing tensions dating back to Eritrea's struggle for independence from Ethiopia, followed by a border dispute that sparked a two-year war in 1998. The neighbors also back different sides in Somalia

In the new resolution, the Security Council calls on Eritrea to immediately withdraw its troops and heavy military equipment from a buffer zone on the border. It also asked Ethiopia to scale back its deployment to the area.