The victims, hailing from Peermedu Upputhurai in Idukki District, were on their way to fireworks hub of Sivakasi for buying crackers for sale in the shop run by their family when the mishap occurred near Kallikudi Police Station, 30 km from here, they said.
The deceased were identified as Jhansi (25), wife of Micahel, who was driving the car, and his sister Jasmine (23).
Michael applied brake to avoid hitting a motorcyclist who suddenly crossed the road and the lorry coming behind rammed into the car.