Three people died on the spot.
The Ogun Traffic Compliance and Enforcement Corps has cautioned drivers against indiscriminate parking on the Lagos-Abeokuta Expressway.
The corpses of victims have been deposited at the Ifo General Hospital, Ogun, while the survivors are also receiving treatment.
The commander appreciated Governor Dapo Abiodun for approving the employment of 1,000 officers.
Temitope Oseni, the Ijako unit commander of TRACE, gave the warning on Tuesday in Ota, Ogun.
A cement truck with no registration number, heading to the tollgate from Sango-Ota, had a brake failure and rammed into four vehicles.
The South-West zonal commander expressed worry over incessant cases of road crashes involving motorcyclists on the road.
He said that the bus was coming from Sango-Ota heading towards Toll-gate.
“The driver suddenly lost control of the vehicle and ran into the bush.”
