Panic-stricken passengers started running towards the exit gates of the Howrah station after hearing two rounds of fire from platform no 17 at around 6.45 am, he said here.
The rifle went off when the finger of a sleeping RPF jawan Satish Kumar accidentally pressed the trigger. The jawan was arrested and a departmental probe initiated, the officer said.
"We are looking into the matter and necessary steps will be taken against the jawan for being casual while on duty," the officer said.