The latest case centred on allegations that Suu Kyi, accepted 11.4kg of gold and cash payments totalling US$600,000 from her protege-turned-accuser, former chief minister of the city of Yangon, Phyo Min Thein.

The latest killings – in Khartoum's sister city – bring the death toll since the outbreak of anti-coup protests on Monday to 11, with about 170 others wounded.

Life came to a halt in the capital Khartoum and its twin city Omdurman across the Nile, with roads blocked either by soldiers or by barricades erected by protesters.

Myanmar topped the agenda of Tuesday's talks between regional leaders, with the country still in chaos following February's military takeover and the subsequent deadly crackdown on dissent.

The Sudan information ministry, still loyal to ousted Prime Minister Abdalla Hamdok, says that the transitional constitution gives only the prime minister the right to declare a state of emergency and that the military's actions are a crime.

The internet was cut across the country as dozens of demonstrators gathered on the streets of the capital Khartoum to protest the arrests, setting fire to tyres.

He says he has been barred from speaking to media, diplomats, international organisations and foreign governments.

This challenges the military's insistence that no coup took place, and that power had been lawfully transferred to the generals by an acting president.

Some opponents of military rule have formed armed groups, under the banner of the People's Defence Forces, and have forged alliances with some ethnic militias that have long seen Myanmar's army as their enemy.

The head of Guinea's military special forces says government 'mismanagement' prompted the coup.

The announcement would place Myanmar in the military's grip for nearly two and a half years instead of the initial one-year timeline the army announced days after the coup.

But it did not say whether fresh polls in the country of 54 million would be held.