At least five people were killed and two others injured when their SUV crashed into a speeding dumper on a busy expressway near the national capital on Thursday.

Police said the accident occurred on the Yamuna Expressway in the northern state of Uttar Pradesh's Greater Noida city bordering Delhi when the victims, all tourists from western India, were returning from Agra, where they had gone to visit the Taj Mahal.

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"They were on the way from Agra towards Noida (sister city of Greater Noida) when their SUV hit the dumper truck from the rear side near Jewar toll plaza," a spokesperson for Noida Police told the local media.

While five of the occupants died on the spot, the injured have been hospitalised. "The condition of one of them is critical," a police officer said.

UP Chief Minister Yogi Adityanath took to Twitter to expresse grief over the loss of the lives in the accident. "Praying for peace to departed souls," he said.

A probe has been ordered into the accident, the police spokesperson said, adding that the truck was seized.

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Road accidents are very common in India, with one taking place every four minutes. These accidents are often blamed on poor roads, rash driving and scant regard for traffic laws.

Indian government's implementation of stricter traffic laws in recent years have failed to rein in accidents, which claim over 100,000 lives every year.