The chieftain of the All Progressives Congress (APC) said the event could not continue in the wake of the attack on a train heading to Kaduna state from Abuja.
TheCable had reported how the train was attacked by gunmen in the Kateri-Rijana area of Kaduna on Monday night. The train was said to have almost reached Rigasa, its final stop.
Speaking shortly after his arrival at the colloquium on Tuesday, Tinubu said he cannot be celebrating and rejoicing amidst a national tragedy.
He said: “I am very sad about the situation and it calls for sober reflection,” before cancelling the event, which already attracted many important dignitaries.
The APC presidential aspirant further appealed for understanding of guests already seated and urged religious leaders to pray for the victims of the train attack.