In a statement, the group said it considers Mohammad Naas as a martyr of the Bahraini revolution.
It said the Manama regime’s deliberate medical negligence was behind his death.
The statement noted that the regime released the activist only after he contracted the coronavirus and medical negligence caused his health to deteriorate.
Martyr Mohammad Naas is the fourth political prisoner falling victim to the regime’s medical negligence in jails, it added.
Al-Wefaq called for the release of all Bahraini political prisoners and bringing those behind violations of human rights in jails to justice.
Back in April, a Bahraini political dissident passed away in a detention center after prison services denied him medical aid, amid reports of alarming conditions of confinement in the kingdom in light of the coronavirus pandemic.
Abbas Malallah died at the notorious Jau Prison — where political leaders, human rights defenders, and other prisoners of conscience are kept — as a result of dangerous, inhumane conditions and medical negligence, Al-Wefaq said at the time.