The mutiny was also staged to demand access to trial and better prison conditions.
Regime forces surrounded the prison, shooting live ammunition, petrol bombs and tear gas into the crowded facility after prisoners took some guards hostage.
Activists say the prison has been without electricity and water for four days and there is mounting evidence of a possible massacre against the prisoners, already living in dire conditions and subjected to grave human rights abuses.
The stand-off, from Monday, is only becoming worse, as activists raise the alarm online, sharing footage posted by prisoners on social media, showing the extent of the unfolding crisis.
Photographs are also being circulated showing regime forces ready to storm the prison.
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