Sudan’s military has imposed a state of emergency, abolished civilian administration, and imprisoned political leaders.
Political infighting, according to Gen Abdel Fattah Burhan, who was heading a combined council with civilian officials.
Protesters have taken to the streets of Khartoum’s capital, and gunfire has been reported.
Since the ousting of long-time ruler Omar al-Bashir and the establishment of the transitional government two years ago, military and civilian authorities have been at conflict.
Prime Minister Abdallah Hamdok is among those who have been placed under house arrest, according to reports.
Protesters manning illuminated barricades and accessing the area near the military’s headquarters were seen in video footage from the north African nation’s capital on Monday.
The detentions were carried out by “joint military forces,” according to a Facebook statement from the information ministry, and those seized were being kept at “an undetermined location.”
Soldiers invaded the public broadcaster’s headquarters in Omdurman, the government said, detaining workers.
Mr Hamdok was reportedly persuaded to endorse a coup, but he refused, urging people to continue nonviolent protests to “protect the revolution,” according to the report.
Military arrests of civilian leaders would be “a betrayal of the revolution, the transition, and the Sudanese people,” according to Robert Fairweather, the UK’s special envoy for Sudan and South Sudan.
The United States, the United Nations, the European Union, and the Arab League have all expressed grave concern.
According to witnesses, the internet has gone down, and army and paramilitary soldiers have been deployed around the city. The airport in Khartoum is presently closed, and international flights have been halted.