NEW DELHI - At least four persons were killed when a police officer with the Railway Protection Force allegedly opened indiscriminate fire inside a moving train in India's southwestern state of Maharashtra on Monday, official sources said.

The shootout took place inside the "Jaipur Express" train (Train Number 12956), which was moving from Jaipur towards the financial capital Mumbai, after it had crossed the Palghar railway station

The shootout took place inside the "Jaipur Express" train (Train Number 12956), which was moving from the country's western city of Jaipur towards the financial capital Mumbai, after it had crossed the Palghar railway station, nearly 90 kilometers from Mumbai.

Among the deceased were a RPF personnel, one worker of the train's pantry, and two passengers, said media reports.

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After the shootout, the assailant reportedly jumped out of the moving train near Dahisar Station in a bid to escape. He was later detained along with the automatic weapon which he allegedly used in the shootout.