According to preliminary reports, the accident occurred when a speeding car hit a bike from behind. The severe impact caused the car to lose balance and collide head-on with a truck coming from the opposite direction.

7 killed in serial crash in Bengaluru
Bengaluru: At least seven people were killed in a chain road accident early Friday morning on the Hoskote-Dabaspet National Highway (NH-648) near M. Satyavar village in Hoskote taluk. The collision between a car, a bike, and a truck left several families devastated.
High Speed Proved Fatal
According to preliminary reports, the accident occurred when a speeding car hit a bike from behind. The severe impact caused the car to lose balance and collide head-on with a truck coming from the opposite direction. In this chain reaction, six people in the car and one on the bike died on the spot.
The accident has sent shockwaves through the entire region.
The identification of the deceased has not yet been disclosed. Further investigation is underway.
(...being updated)