India, Jan. 25 -- A railway staffer was injured and a freight engine and railway track were damaged in an explosion in a freight corridor near Sirhind in Punjab's Fatehgarh Sahib district on Friday night, following which a pro-Khalistan group claimed responsibility for the incident, officials said on Saturday.

The Khalistan Zindabaad Force (KLF), in a statement issued by Ranjit Singh Jammu, claimed responsibility and said the explosion was carried out on the 40th anniversary of the declaration of Khalistan to "remind the Indian government that the fight for Khalistan was still alive and would continue."

A senior police officer, privy to the investigation, said, "Our teams are already investigating the case. NIA has also joined the probe...