No details have been revealed, and the reasons behind Omer's detention remain unknown.
Media reports emerged earlier in the day that the ousted Sudanese president, Omar Bashir, had been transferred from house arrest, imposed since April 11 military coup, to the Kober maximum security prison in Khartoum.
Bashir, who governed the North African country for nearly 30 years, was detained by the country's military on April 11. The transitional military council vowed to hold a new election in two years. However, rallies have continued, with the protesters demanding that the military hand power to a new civilian government.