(AP) – U.S. diplomats in Sudan have issued warnings to American citizens in the country citing the military’s closure of areas in and around the capital and reports of violence against protesters.

The U.S. Embassy in Khartoum urged Americans to “shelter in place” and “remain aware of their surroundings” hours after Sudan’s top general declared a state of emergency and dissolved the civilian government. Internet remained widely disrupted across the country and the embassy noted it was “non-functional” in Khartoum.

It asked that American citizens not travel to the U.S. Embassy or to international airports in Khartoum or Port Sudan, where it said outbound flights were halted.

The military coup today plunged Sudan’s fragile political transition into uncertainty, two years after mass protests helped to topple the iron-fisted rule of longtime autocrat Omar al-Bashir.