Eyewitnesses said the train was forced to halt for over 10 minutes.
A metro official however said services on Yellow Line (Line 2) were not much affected due to the "commotion".
"Around 15-20 people blocked the train protesting against malfunctioning of AFC gates and lack of ticket counters," the official said.
Line 2 connects Huda City Centre, located in Gurgaon, to Samaypur Badli in North Delhi.
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