Four Indo-Tibetan Border Police (ITBP) personnel were killed and six others injured after the bus they were travelling in was hit by a boulder near Likabali town in Arunachal Pradesh.
The incident took place earlier in the day when the boulder, loosened by monsoon rains, rolled down a mountain and hit the bus carrying at least 20 personnel.
The ITBP personnel who were critically injured in the incident have been sent to Dibrugarh in a chopper.
This is the second landslide-related incident in Arunachal Pradesh within five days.