The mishap occurred on Kangeyam-Vellakoil road early this morning when the car carrying eight persons was heading to the city from Tiruvarur district, police said.
While three persons were killed, five others who suffered injuries are undergoing treatment in a private hospital here, they said.
Under the impact of collision, the lorry caught fire.
However, fire and rescue services personnel reached the spot and put out the flames, they said.
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