"We have requested the government of India for an international inquiry into the brutal attack on the Pakistani citizen. We request the government of India to immediately give his body to his family members so the funeral can take place according to Islamic rituals," Manzoor Ali Memon, one of the three diplomats granted consular access to the prisoner, told a TV channel.
Sanaullah, who had been at the PGIMER hospital after his attack in Jammu's Kot Bhalwal jail May 3, died just before 8 a.m. Thursday.
"We are in deep grief and we are shocked. We express our deep condolences to Sanaullah's family and people of Pakistan for the brutal and extra judicial killing of the innocent citizen of Pakistan. The killing has taken place under the nose of Jammu and Kashmir jail authorities," Memon said.
The Pakistani had been in deep coma since he had been flown to Chandigarh from Jammu last Friday.
Sanaullah had suffered renal failure Wednesday.
"There is a need for agreement of security and safety of prisoners in jail," Memon told a news channel here.
The attack on Sanaullah took place a day after Sarabjit Singh, an Indian prisoner in Pakistan, succumbed to grievous injuries following a murderous assault in Lahore's Kot Lakhpat Jail.
Sanaullah was arrested in 1996 and charged with involvement in a bomb blast at Katra near the Hindu shrine of Mata Vaishno Devi in 1994 which left 10 people dead. He was serving life term in the Jammu jail.