A Kenya Urban Roads Authority's vehicle loaded with 400 litres of chang’aa rolled in Limuru on Sunday morning.
The driver fled the scene and, by evening, had not been traced.
Traffic Commandant Jacinta Muthoni said police were yet to establish if the driver was injured in the 3am accident at Rironi on the Naivasha-Nairobi highway, though preliminary investigations showed no other vehicle was involved.
She said the driver was accompanied by an unknown number of people.
“We have detained the car at Tigoni Police Station and hope that Kura will cooperate with us in giving us the driver’s particulars,” said Ms Muthoni.
The grey Toyota Prado was damaged on the left side but the driver’s side was intact.
A witness said the “drunk” driver was travelling towards Nairobi when he lost control of the vehicle and it rolled, landing in the middle of the road.
If arrested, the driver is likely to be charged with careless driving and failing to report an accident.
The illicit alcohol was packed in 20-litre and five-litre containers.