The injured children were receiving medical attention following the incident, which took place on Wednesday in Nigeria's third-largest city, Oyo State Police Command said.
"Eight persons have since been arrested for their various involvements", police spokesperson Adewale Osifeso said in a statement. Among those detained was the main sponsor of the event at the Basorun Islamic High School, which was organised by the Wings Foundation and Agidigbo FM radio. The Homicide Section of the State Criminal Investigation Department has opened a probe, Osifeso added.
Nigeria has seen several deadly stampedes in recent months. In March, two students died and 23 were hurt after being crushed as thousands gathered for free bags of rice handed out by local authorities at Nasarawa State University, in central Nigeria. Later that month, another stampede killed four women who had been waiting outside the office of a wealthy businessman in the northern city of Bauchi to collect 5,000 naira ($3.40) cash gifts to help pay for food during the Muslim holy month of Ramadan. Witnesses said members of the crowd pushed to get hold of the money, causing a stampede, as Nigeria grappled with its worst economic crisis in a generation.
Nigerian President Bola Tinubu on Thursday in a statement "expressed profound sadness over the tragic incident". He offered his "heartfelt condolences" to locals, state authorities and the "grieving families who have lost their beloved children". He urged the "Oyo State government to take every necessary measure to prevent such a tragedy from reoccurring", the statement by the presidency added. "Among the essential actions are a comprehensive review of all public events' safety measures, strict enforcement of safety regulations, and regular safety audits of event venues," Tinubu added.