Seven people were killed and one injured when their car hit a roadside tree near Thozhuthur in the district on October 18, the police said.
The accident took place on the Chennai-Tiruchirappalli highway, they said.
According to the police, the accident took place when the car's passengers were going to Pathanamthitta in Kerala.
Police said the accident occurred at around 2 a.m. The victims were identified as Pradeep, Prakash, his wife Priya, Joseph, Kutty, all hailing from Mogappair in Chennai and the car driver Siva from Chennai. The identity of one person is yet to be ascertained.
In the impact, Pradeep and six others died on the spot. Pradeep’s sister Preethi (28) sustained serious injuries and was admitted to the Perambalur Government Hospital.