A number of Sudan’s bank, airport and electricity workers have been arrested ahead of a strike against the military rule, the main protest group says.

The Sudanese Professionals Association (SPA) says employees are also being threatened by the authorities.

The ruling Transitional Military Council (TMC) has made no comment.

Campaigners have called for ongoing civil disobedience from this Sunday (today), days after a military crackdown left dozens dead in the capital Khartoum.

The military took over after persistent protests led to the ousting of long-time president Omar al-Bashir in April, promising a transition to civilian rule but pro-democracy campaigners said the military council cannot be trusted after Monday’s crackdown against a sit-in demonstration in Khartoum and they have rejected an offer of talks.

In a separate development, three opposition figures involved in mediation efforts have been arrested.

Reports say most offices and businesses remain shut and traffic is light in the city.

There have been reports of gunfire as security forces maintain their deployments across most parts of Khartoum.

Protest leaders have asked people to stay home and not work as a form of civil disobedience.

They said that demonstrations are no longer possible because of the violent crackdown by the military.

“The civil disobedience movement will begin Sunday and end only when a civilian government announces itself in power on state television,” the SPA said in a statement, adding that disobedience is a peaceful act capable of bringing to its knees the most powerful weapons arsenal in the world.

The goal of the strike is to create an effective government shutdown that will make it hard for the military council to govern.