Rohan Gunaratna and Khuram Iqbal’s 2011 book Pakistan: Terrorism Ground Zero, seems to confirm that JeM operated a "large training camp for between 800 and 1,000 recruits at Balakot in Khyber Pakhtunkhwa". According to the book, the camp was administered by "Yousuf, a Christian convert to Islam from Sindh who is married to Azhar's sister". The JeM facility at Balakot was called the ‘Syed Ahmad Shaeed’ training camp, Gunaratna and Iqbal wrote, adding that Indian sources said the camp was still functional in early 2003, even after the group was banned in January 2002.
If the name of the camp is anything to go by, JeM's “biggest training camp” that India struck, and the town that it is associated with, might have had an ideological and symbolic significance for many Pakistan-based terrorist organisations. That seems to be borne by the association of Sayyid Ahmad of Rae Bareli, or Syed Ahmad Shaheed Barelvi as he is also known, with Balakot in Khyber Pakhtunkhwa.