On Saturday, the bus with 40 people on board went off the road for unknown reasons near Karatu, a town about 150 km from the northern city of Arusha, Efe news reported.
Police said rescue workers were working at the scene to recover the bodies.
Innocent Mushi, the principal of the Lucky Vincent elementary school where the children were studying, said 17 girls and 12 boys were among the victims.
Two teachers who were accompanying the minors on the trip to Karatu for some school exams and the bus driver also were killed.
Tanzanian President John Magufuli lamented the tragedy and sent his condolences to the families.
Traffic accidents are frequent in Tanzania and many other African countries due to the poor condition of vehicles and roads.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
About VDC
Doraiah Chowdary Vundavally is a Software engineer at VTech . He is the news editor of SocialNews.XYZ and Freelance writer-contributes Telugu and English Columns on Films, Politics, and Gossips. He is the primary contributor for South Cinema Section of SocialNews.XYZ. His mission is to help to develop SocialNews.XYZ into a News website that has no bias or judgement towards any.