The World Forum of Proximity of Islamic Schools of Thought sent its condolence message to Sheikh Zakzaky. The letter was signed by its Secretary General General Ayatullah Muhsin Araki.
The letter said "The sad and bitter news of the death of your devoted son Sheikh Mahmud Zakzaky has reached us which occurred while commemorating Intentional Quds Day. Sheikh Mahmud is known for his service to Islam and the School of Ahlulbayt(AS)- a good servant of the haneef religion of Islam who spent his life in upholding the value Islam and in the unity of the Islamic Ummah."
"The news of death left our hearts in grief and for this I really expressed condolence to you and your family members on behalf of myself and entire members of The World Forum of Proximity of Islamic Schools of Thought over the painful incidence.
I pray for Allah to cover the deceased with His mercy and make him among the dwellers of paradise with Martyrs and devoted servants of Allah. May Allah also give the family the strength to bear the loss"