Prisoners trapped underground at notorious Syrian prison

Rescue groups and families in Syria are calling for international help with finding relatives imprisoned by the Assad regime in underground cells at the notorious Saydnaya Prison facility after scores of detainees were freed on Sunday following the ousting of the Assad regime.

Several cells are reportedly inaccessible due to secret codes and gates, while the prison’s sprawling complex - built like a labyrinth - has also proved difficult for opposition figures to navigate.

Some prisoners were previously held in the "white" part of the prison and were freed with the help of opposition rebels and local residents. Many have also been freed from the "red", underground part of the prison – though several others remain in captivity. Such obstacles have prompted calls from international experts to help with freeing the rest of the inmates