Sudan's military authorities on Sunday once again detained a former senior Islamist official who is wanted by the International Criminal Court over atrocities related to the Darfur conflict in the early 2000s, two defense lawyers said.

Ahmed Haroun, a senior security official during the rule of longtime dictator Omar al-Bashir, and later chairman of the former ruling National Congress Party, was detained in Omdurman, the sister city of the capital, Khartoum, according to two lawyers on his defense team.

The lawyers had said earlier he was detained in the eastern province of Kassala.