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A low intensity blast outside a Sufi shrine in Pakistan's city of Lahore killed at least two and injured dozens of other people. Police are investigating to find the source of the blast.

At least two people were killed and 24 others injured in an explosion outside a Sufi shrine in Pakistan's Lahore City on Thursday.

Police are investigating whether the blast was caused by a firecracker or by a device thrown from a moving vehicle.

Witnesses say a crowd of worshippers gathered at the shrine when the explosion occurred.

[Jahangir Khan, Eyewitness]:
"I was here to pay my respect to the saint. As I was returning after praying, I heard an explosion, and we all ran in chaos."

Police cordoned off the area and the injured were immediately taken to the hospital. Muslims in Pakistan visit shrines and mosques in large numbers on Thursday nights and Friday.

More than 40 people were killed and at least 120 wounded in an attack at a Sufi shrine in Lahore last year.