An unknown number of people got injured in a road accident involving several vehicles at Nairobi Expressway, Mlolongo toll station, on Saturday night.

Kenya National Highways Authority confirmed the accident and said the vehicle exiting the expressway was being driven at high speed leading to the Accident.

"The motorist crashed into the Toll Plaza and ran over other vehicles that were being cleared to exit. Consequently, the vehicle knocked one toll booth and injured one toll attendant besides the other motorists," KeNHA said in a statement.

The Authority added that those injured have been rushed to the hospital for medical attention and are responding to treatment.

The affected exit booth has been closed.

Athi River base commander Agnes Makau told NTV that one motorist died as a result of the accident.

"The Nairobi Expressway is committed to providing a safe and reliable toll road service and would wish to assure the public that they are putting measures in place to avert such unfortunate incidents from occurring," KeNHA noted.

"Motorists are advised to avoid overspeeding and be cautious while on the road."

This is the first big accident to be reported at the newly launched expressway.

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