The mishap occurred between 6.15 AM to 6.30 AM when the four labourers, all railway contractual employees, came under the wheels of a Chhatrapati Shivaji Terminus (CST)-bound suburban train, a Government Railway Police official said.
An inquiry would be constituted to ascertain the reason behind the mishap, he said.
As per preliminary information, the accident occurred when the four contract labourers of railway were walking along the tracks between Kurla and Vidyavihar railway stations. They were run over by the Karjat-CST local train, Deputy Commissioner of Railway Police, Central Railway, Rupali Ambure said.
The four victims were rushed to nearby Rajawadi hospital where they were declared dead, a senior railway official said.
“It seems the trackmen may not have noticed the moving train as it was dark,” he said, adding that more details about the incident were awaited.
Earlier on November 3, 2013, four railway gangmen, carrying out maintenance work on the tracks, were killed after being hit by a speeding Kolhapur-bound long distance train between Thakurli and Kalyan railway stations in the neighbouring Thane district.