Miscreants pelt stones at Train 18 during its trial run on Friday (February 1) in New Delhi.
Similar incident occured barely a month ago, officials said.
The train was escorted by Railway Protection Force (RPF) personnel.
"On reaching New Delhi station, the escort party informed about stone pelting. Second coach from the front was hit near Sadar area under DLT (Delhi Lahori Gate) post.
"A railway servant present in T-18 informed the escort party that a stone hit the window glass of coach No.188320 of T-18," a northern Railway official said.
No suspect was found.
Earlier, stones were pelted at the train on December 20, 2018, during a trial run between Delhi and Agra.
No one was hurt in the incident and no arrests were made after the incident that occurred when the train left Shakurbasti at around 11.03 pm on Friday to reach New Delhi to begin its trial run to Allahabad, railways said.

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