The Forces of the Declaration of Freedom and Change in Sudan called for a "comprehensive national campaign to release all detainees in prisons, who are more than 200 people."
The call of the former ruling coalition came in a statement on Sunday, in conjunction with the visit of the United Nations human rights expert, Adama Deng, to the country.
"Freedom and Change" condemned the arrest of a member of its executive office, Taha Othman, on Saturday, considering it a "fabricated political arrest in criminal clothes."
The statement added, "We call on the Sudanese at home and abroad to organize a comprehensive national campaign to release all detainees, who are more than 200 people, including more than 96 people in Soba prison" (south of Khartoum).
"Let our voices rise in demand to stop violence and torture, raise the banner of solidarity with the families of detainees, and demand that food and medicine be provided to their families in prisons."
The statement also urged lawyers and human rights organizations to meet with the UN expert Adama Dieng, who arrived in Sudan.
The statement went on, "to demand that he visit the detainees, work for their release, stop violence, torture and gross violations of human rights, and form an independent commission to investigate the murders committed after the October 25 coup."
And earlier on Sunday, the UN expert, Adama Deng, began his first official visit to Khartoum, a month after it was postponed at the request of the Sudanese authorities, and will continue until Thursday.
Since October 25, Sudan has witnessed protests, rejecting exceptional measures taken by Al-Burhan, most notably the imposition of a state of emergency and the dissolution of the Sovereignty Council and the Council of Ministers.