At least 20 people have been murdered and others wounded at a Sufi shrine near the city of Sargodha, in Pakistan’s Punjab province, police say.
Deputy police commissioner Liaquat Ali Chatta said the main suspect was the shrine’s custodian, Abdul Waheed.
The shrine was run by a Sufi saint, Muhammad Ali Gujjar, who was not there on the day of the murders.
One survivor told police Mr Waheed had called followers into his chamber one by one, and gave them poisoned food.
He and his companions then killed them with a dagger and a stick.