"Bechar Jograna Rabari, Meru Rabari, Lala Rabari and Lakha Rabari were killed when their car collided head-on with a truck on NH-8 at Kuvadava village," sub-inspector R G Rathod said.
One another person who is yet to be identified succumbed on the way to the hospital, Rathod added.
The car driver apparently lost control after the tyre burst and rammed into the truck coming from the opposite direction, police said.