At least 20 people were killed and 50 others injured on Saturday in two back-to-back blasts that struck a camp set up for those displaced by anti-militancy operations in northwest Pakistan.

The nature of the explosions at the Kuccha Pakka relief camp, located 30 kms from Hangu city in North West Frontier Province, could not immediately be ascertained. The second blast occurred when a large number of people had gathered to remove bodies and help the injured after the first explosion, reports reaching here said, adding the twin blasts left 20 people dead and 50 others injured.