However, the railways said 25 persons were injured in the incident and that the dumper did not belong to them.
The train travelling from Azamgarh to Delhi collided with the dumper at around 2:50 am between Pata and Achhalda railway stations, a spokesperson for the North Central Railway (NCR) said.
Principal Secretary (Home) Arvind Kumar said 74 people were injured of which four received serious injuries and have been rushed to Saifai and Etawah hospitals.
Kafiyat Express met with an accident at an unmanned railway crossing because of a loader carrying sand for track work for dedicated freight corridor, Secretary, Home, Bhagwan Swarup said.
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Rescue operations are over and passengers have been moved to Achalda railway station and rescue train in arriving to take them to Delhi.
This is the second train accident in Uttar Pradesh in five days. On Saturday, a passenger train derailed in Muzaffaragar district leaving over 22 dead and 156 others injured.
"An unauthorised dumper broke the railway fence and hit the engine of Kaifiyat Express causing derailment," the Railway Ministry said in a statement.
Railway Minister Suresh Prabhu tweeted, "A dumper hit the locomotive of the Kaifiyat Express, resulting in derailment. Some passengers have received injuries and have been shifted to nearby hospitals".
He said that he was personally monitoring the situation and had directed senior officials to reach the site immediately.
Kaifiyat Express travels between Azamgarh in Uttar Pradesh and Delhi and the collision has impacted the train operations on the Delhi-Howrah route.
Five trains including Howrah-New Delhi Rajdhani have been diverted and seven trains including Kanpur-New Delhi Shatabdi express have been cancelled. Since both UP and DOWN lines are blocked, around 40 local trains were also being diverted.
Additional forces and ambulance were rushed to the spot from Auraiya, Etawah and Kannauj, while NDRF team was dispatched from Lucknow to provide support to the victims. A medical train and a relief train have been dispatched from Allahabad to the accident site.
A spokesman for NCR said rescue operations have been concluded and all injured were sent to hospitals nearby.
Additional forces and ambulance were rushed to the spot from Auraiya, Etawah and Kannauj while NDRF team was dispatched from Lucknow to provide succour to the victims.