The custodian of a Pakistani religious shrine and two accomplices have been arrested for intoxicating and murdering 20 devotees with batons and knives early on Sunday.
Sixteen men and four women were killed in the attack at the Sufi Shrine to Mohammad Ali in Punjab province, according to police.
The motive for the slaughter was unclear but some officials said the chief suspect had mental health problems and had used violence on followers before.
"The 50-year-old shrine custodian, Abdul Waheed, has confessed that he killed these people because he feared that they had come to kill him," said regional police chief Zulfiqar Hameed.
"The suspect appears to be paranoid and psychotic, or it could be related to rivalry for the control of shrine."
He said in investigation into the killings near the city of Sargodha was continuing.
Local police station chief Shamshir Joya said the victims, whose clothes were torn and bloodstained, appeared to have been given intoxicants.
"We suspect that the victims had been given some intoxicants before they were murdered, but we will wait for a forensics report to confirm this suspicion," he added.
Mr Joya said the shrine was built in the area some two and a half years ago. Mr Waheed, a one-time employee of the national election commission, took it over after completion.
Local rescue service official Mazhar Shah said Mr Waheed used to meet devotees once or twice a month and used violence to "heal" them.
"Local people say that Waheed used to beat the visitors who came to him for treatment of various physical or spiritual ailments," said Mr Shah.
"Sometimes he would remove the clothes of his visitors and burn them."
Television footage showed scattered shoes, clothes, sheets and cots in the yard of the white-painted domed shrine as police vehicles and police commandos surrounded the premises.
Visiting shrines and offering alms for the poor – and cash to the custodians – remains a very popular custom in Pakistan. Many believe such practices will help get their prayers answered.
The Punjab minister for religious affairs, Zaeem Qadri, said intelligence agencies along with police and the local government were investigating all aspects of the case.
Mr Qadri said his department managed some 552 shrines in the province, but that this one was not registered with it.
"Investigators will also look into how this shrine was allowed to be set up on private land," he said.
For centuries Pakistan was a land of Sufism, a mystical branch of Islam whose wandering holy men helped spread the religion throughout the Indian subcontinent in the 13th century.
Sufis believe in saints which they say can intercede for them directly with God. They have no hierarchy or organisation, instead seeking spiritual communion through music and dance at the shrines of saints.
Several million Muslims in Pakistan are still believed to follow Sufism, although it has been overtaken in recent decades by more conservative versions of the faith.
Militant groups, including the Taliban and ISIL, have carried out major attacks on Sufi shrines because they consider them heretical.
In February, 88 people were killed and hundreds wounded in Pakistan’s southern province of Sindh when a suicide bomber blew himself up among devotees at a Sufi shrine.

Source: The National