The Asmara government quit the Intergovernmental Authority on Development in Eastern Africa (IGAD) in 2007 to protest Ethiopian troops' entry into Somalia to force out its Islamist rulers.
"Eritrea resumed its activity in IGAD and took its seat at the 14th Ordinary Summit in Djibouti," Information Minister Yemane Meskel wrote on Twitter late on Monday after the summit.
He did not say what had prompted the decision but said Eritrea wanted to join other IGAD members and help advance peace and stability in the region.
--Reuters--