Ethiopian forces crossed the border into Sudanese territory in an act of "aggression", Sudan's foreign ministry said in a statement on Sunday.
"Ethiopia's infiltration into Sudanese land is an unfortunate and unacceptable escalation, which could have dangerous repercussions on security and stability in the region," the Sudanese foreign ministry said in a statement.
Clashes erupted late last year between Sudanese and Ethiopian forces over Al-Fashqa, an area settled by Ethiopian farmers which lies on the Sudanese side of a border demarcated at the start of the 20th century.
Last month, Sudan claimed that an Ethiopian aircraft had crossed the border, a charge Ethiopia denies.
