A woman was killed and 25 others were injured when the tractor-trolley they were travelling in overturned in Kashipur town of Udhamsingh Nagar district today, police said.
 
The incident took place when the vehicle carrying labourers suddenly overturned, killing one of them on the spot, they said.
 
The injured were rushed to a local hospital where the condition of one of them is stated to be critical, police said.