Demonstrations took place in more than a dozen locations in the Sudanese capital of Khartoum and other cities on Thursday, demanding the demonstrators President Omar al-Bashir to step down, and called for the overthrow of the regime and justice and freedom and democracy and bring the killers of demonstrators to justice.

The Sudanese Union of Professionals (an independent group of doctors, engineers, teachers and university professors) said in a statement that several cities have witnessed the most important protests: Khartoum (center), Qudarif (east), Wadmdani and Mankal (east) and Sennar (southeast).

The group of professionals pointed out the exit of more than thirty marches (march) demanding the departure of President al-Bashir in various parts of the country.

Reuters quoted witnesses as saying police fired tear gas at protestors in the Berri district of Khartoum.

In Gedaref state, protesters closed the main road leading to the seat of the state government's parliament. Police fired tear gas at protests in Port Sudan, east of the country, as well as cities in the central island state of the island.

International and local human rights organizations have warned the Sudanese government against using force or firing live ammunition at defenseless citizens.

On Wednesday, a gathering of Sudanese professionals and three opposition coalitions announced 17 protest rally sites, paving the way for the "step-by-step procession" toward the presidential palace in Khartoum on Thursday, as well as mass rallies in cities and villages across the country.

The gathering of professionals has organized four marches in central Khartoum since the protests broke out on December 19, with the aim of handing over a memorandum to the presidential palace demanding the resignation of President Bashir, who has been in power since 1989.

During the protests, 26 people were killed, according to the latest government census, while Amnesty International says 40 people were killed.

Against the background of the protests, President Bashir accused the past Sunday of assassins and saboteurs of rebel armed movements who killed protesters in demonstrations aimed at fueling strife and strife in the country.