The students from Lucky Vincent primary were on their way to visit another school. The pupils were set to take an exam. The dead included 12 boys and 17 girls. Several other children were wounded, some of them severely, according to police. Authorities have launched a rescue operation to recover the trapped bodies. President John Magufuli described the accident as a “national tragedy” in a statement. He also said: “This accident extinguishes the dreams of these children who were preparing to serve the nation, it is an immense pain for the families involved and for the whole nation.” “We are still investigating the incident to determine if it was caused by a mechanical defect or human error on the part of the driver,” the police said. More than 11,000 people were killed in road accidents in Tanzania between 2014 and 2016.