Speaking in Brussels, he said, "I express my deepest concern on the reported involvement of foreign forces in Somalia and urge all external players to refrain immediately from intervening militarily in Somali affairs and provoke further violence."
The recent battles have been particularly bad for the civilian population. Thousands have been forced to flee their homes.
Ethiopia declared war on Somalia's Islamists late Sunday, saying it was defending itself from the group which controls much of the Horn of Africa country.
© 2006 DPA