According to North Central Railway (NCR) zone headquarters here, the mishap took place at about 1130 hours at Athsarai station, about 70 kms from the city.
"Coach number S5 and the pantry car of train number 12311 UP Kalka Mail, originating from Howrah and running up to Kalka via Delhi, were uncoupled at Athsarai.The train was moving at a very slow speed and no injuries were caused to any person aboard the train", NCR PRO Amit Malviya said.
"We have managed to minimise the effect of the mishap on the traffic on the busy Howrah-Delhi route. The Kalka Express, too, is likely to resume its onward journey not more than three hours behind schedule", he added.