Howrah, Dec 25 (ANI): Three Railway Protection Force (RPF) personnel were killed after they clashed with each other in West Bengal. Other personnel on duty informed that they heard rounds of firing but were unaware of the reason behind the clash. RPF Inspector General (IG), Binod Kumar Daka, said the matter was under investigation. The three deceased personnel have been identified as Assistant Sub-Inspector (ASI) J Yadav, two head constables Bhagwat Chowdhury and DK Singh. The RPF is an Indian Central Armed Police Force charged with protecting railways.