The incident, which happened at Omi Adio axis of the Ibadan-Abeokuta expressway, Tuesday afternoon, left several others with injuries.
DAILY POST gathered that apart from the pregnant woman who lost her life, no fewer than eight people were said to have sustained severe injuries when they were trapped in the commercial bus coming from Apata to Omi Adio, along the one lane expressway.
The ill-fated commercial bus, according to eyewitness account developed mechanical problem when its shaft pulled off, causing the driver to lose control and rammed into a ditch after somersaulting several times.
However, the confused passengers numbering about ten were in the process of finding their way out of the wrecked bus when it went up in flames and trapped the occupants.
As dozens of sympathisers struggled to rescue the victims, the pregnant woman who was said to seated in the front became unconscious and was unable to escape from the inferno, which also caught other passengers in the bus.
A team of Police officers from the Apata Ibadan unit of the Federal Road Safety Corp (FRSC), and police officers from the traffic section of the Omi Adio, Ibadan Divisional Police Station were seen assisting sympathisers to evacuate the victims of the accident from the deep valley where the bus plunged into.
As at the time of filing this report, the wreckage of the commercial bus was yet to be retrieved from the deep valley.
Those injured have been rushed to a nearby medical facility, Alaafia hospital, Apata where they are receiving medical attention.
The corpse of the pregnant woman, our correspondent gathered, was said to have been deposited at the Adeoyo State hospital morgue, Ring road, Ibadan.