The mishap occurred at around 8 AM today when the school bus carrying children, in the age group of 3 to 7, from adjoining Walgaon, Khartalegaon and Kund Sarjapur villages, collided with a MSRTC mini bus coming towards Amravati from Paratwada at Navsari bypass intersection.
The school bus driver failed to notice the mini bus and collided with it.
Three children were killed on the spot, while 14 others were injured, including two of them seriously, Gadge Nagar police station ACP Mohan Kshirsagar said.
The deceased children were identified as - Om Ashish Pawar, Rohit Satish Kukade and Utkarsha Pradeep Nirmal.
The injured have been admitted to district general hospital and other private hospitals in the city.
Drivers of both the buses have been taken into custody, Kshirsagar said.