Parents and guardians concerned about the incident have been told to contact a helpline set up by Kingston Maurward College on 07894 751 302
Dorset Police said three passengers and the driver of a double-decker bus have been treated for "minor injuries"
The bus, registered to Plymouth, was heading to Kingston Maurward College in Dorchester, police said.
– DORSET POLICE SPOKESPERSON
Police, ambulance and fire crews were called to the A350 this morning after reports that a school bus had overturned in a field.
Three people and the driver were treated for minor injuries, and all those on board were moved to safety while they wait for replacement transport.
A college bus carrying 56 students has crashed into a field off the A350 between Upton and Lytchett in Poole. It happened shortly after 8.15am this morning (Monday).
Dorset Police said three passengers and the driver were treated for "minor injuries".