Ruling on prisoners praying Jumu’ah when they are in their cells
Question

                What is the ruling on prisoners praying Jumu’ah and praying in congregation behind one imaam who stands in front of them, when they are in their cells, via loudspeakers.
Praise be to Allah. 
          The Committee of Senior Scholars issued a fatwa stating 
          that they did not agree with prisoners praying Jumu’ah or in congregation 
          behind one imaam in Jumu’ah or congregational prayers, and following 
          him via loudspeakers whilst they are in their prison cells, because 
          they are not obliged to pray Jumu’ah since they cannot go to the prayer, 
          and for other reasons. 
 
          But anyone who is able to attend Jumu’ah prayers in the 
          prison mosque – if there is a mosque there – should pray it in congregation. 
          Otherwise a person is not obliged to pray Jumu’ah and he should pray 
          Zuhr instead. The group in each cell should pray the five daily prayers 
          in congregation inside their cell if it is not possible for them to 
          gather in the mosque or in one place.