The accident took place yesterday when the bus carrying around 30 children, aged between 6 to 10, skidded off the road due to rain in Jhautola area, police said.
The children were on their way back to Benapole from Mujibnagar in Meherpur district after a picnic, Matiur Rahman, officer-in-charge of Chougacha Police Station, was quoted by Daily Star as saying.
The seven children died on the spot, he added.