A truck driver lost control over his vehicle when the brake failed and killed two people along the Moniya-Iseyin road, in Ibadan on Saturday, according to a Guardian report.
At least ten other people also suffered various degree of injuries while five motorcycles and three tricycles were destroyed beyond repair.
The victims include a motorcyclist and a trader at the Moniya Butcher market, Ibadan.
Other sources said four people died but police confirmed two casualties.
The driver of the tipper was said to have escaped from the scene of the accident unhurt.
According to the source, the truck driver was seen struggling to gain control of the truck which was suspected to have left a tipper garage within the Moniya axis with the load of sand, but the bad situation of the road did not help matters.
Chairman, National Union of Road Transport Workers, (Motorcycle), Moniya Garage Unit, Mr. Idris Oladoja described the incident as a sad development that could have been averted.
Confirming the causality figure, Oladoja said the portholes on the road as well as its narrowness contributed to the number accident urging the government to come to the aid of the road users in the axis.
His counterpart at the tricycle unit, Mr. Femi Adeniyi said he was the one who saw how the tipper was wavering in its movement while descending the hilly but rough road while it was about 200 metres away.
He said despite his screaming and shouting that the motorcycles and tricycles parked by the side of the road be cleared, the noise from the environment and vehicular movement made it difficult for some people to get the message on time, after which the tipper swerved into the butcher market.
Men of the police force from nearby Moniya Divisional headquarters and Ojoo were seen at the scene maintaining traffic flow and law and other.
When contacted, the Police Public Relations Officer, Oyo State Command, SP Adekunle Ajisebutu said two people were confirmed dead and their corpses deposited at the State Hospital, Mortuary, Ringroad, Ibadan for autopsy.
The police spokesperson also added that the erring driver of the tipper has been arrested and the accident vehicle recovered to the station for VIO inspection.