Based on preliminary information, the Borivali GRP have registered a murder case against an unidentified person. Efforts are being made to trace the attacker, the official added.
Nine persons were injured in a stampede after rush for boarding a train at Bandra railway station in Mumbai on Sunday morning, a civic official said.
Railway Protection Force (RPF) constable Chetan Singh, arrested on charges of gunning down his senior officer and three passengers on a moving train last week, has now been booked for promoting enmity between groups, while a court in Mumbai on Monday extended his police custody till August 11.
The constable fired from his automatic weapon, killing an RPF Assistant Sub Inspector and three other passengers of the Jaipur-Mumbai Central Express shortly after 5 am, the official said.
The railways on Tuesday said the RPF constable accused in the Jaipur-Mumbai train shooting incident kept the treatment he would have been undergoing for any mental condition a "secret" and no such ailment was detected in the last periodic medical examination for the force's personnel.
Railway Protection Force (RPF) constable Chetan Singh forced a passenger of the B2 bogie of the Jaipur-Mumbai train to walk at gunpoint up to the pantry car, which is two coaches away, where he shot him dead, a GRP official said on Tuesday citing the investigation.
A magistrate's court in Mumbai, which denied permission for subjecting dismissed RPF constable Chetansinh Chaudhary, accused of shooting four persons dead on a moving train, to narco tests has said in its reasoning that to remain silent is an accused person's fundamental right.
Seeking his custody, the police told the court that the mental health condition of the accused constable was yet to be conducted and that he was not cooperating with them.
Her statement also mentioned that the accused had a "blood clot" in the brain and was taking medicines for the same.
Dismissed RPF constable Chetansinh Chaudhary, accused of killing his senior colleague and three passengers on a moving train, appears to have harboured "anger and grudge" towards a particular community and showed no remorse for the crime committed, the police said in its response to his bail.
Eight days after an American woman was allegedly attacked and robbed inside a moving suburban train, Railway Police on Monday claimed to have cracked the case, with the arrest of a drug addict from Masjid Bunder in south Mumbai.