Sudan's official news agency says the military arrested three foreigners, and a South Sudanese soldier in a disputed region along the southern border where violence between the two neighbors has spiked in recent weeks.
The official news agency said Saturday the four were engaged in "suspicious" activities in the Heglig region. It did not elaborate.
Fighting along the north-south border has been near constant over the past three weeks, bringing the two countries to the brink of war. Troops from South Sudan briefly captured the oil-rich border town of Heglig, which is claimed by Sudan.
Sudan's Minister of Information Abdullah Massar said the detainees were British, Norwegian and South African. He said they were currently being interrogated.