The incident happened on the Howrah-Panskura section, nearly 80 km from Howrah station.
"No one was injured as the EMU local was moving at a very slow speed and hit the stationary train before coming to a halt," SER spokesman Sanjoy Ghosh said here.
None of the trains were damaged either, he said.
At 2.42 pm, a Medinipur-Howrah local stopped behind a goods train near the home signal of Haur station in an automatic signal zone. Another EMU local on Balichak-Howrah route was also travelling in the same direction and was behind the Medinipur local.
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"The motorman (driver) of Balichak local has been suspended and a high-level inquiry has been ordered," he said.
Explaining the rules of train movement in an automatic section zone, the SER spokesman said: "Trains can follow one after the other as per automatic signalling aspects."
"If the signal is red, a train is supposed to stop one minute in day time and two minutes at night, after which it can proceed with 15 km per hour speed restriction, keeping a 75 metre distance from the train ahead," Ghosh said.