The incident happened at Injambakkam here and no persons were injured in the incident, police said.
Similarly, unknown persons hurled petrol bomb at the car of Cheyyur MLA K Raji (AIADMK) near Kalpakkam late last night in which the vehicle was partially damaged, police said, adding, a nearby house also suffered minor damage.
At Kancheepuram, a bus belonging to a private school was set on fire even as a state-run liquor outlet was also torched by miscreants, police said.
A bus parked nearby was damaged, police said.
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Stray incidents of violence including torching and stoning government buses have been reported from the northern districts of the state in the wake of the arrest of PMK leaders, S Ramadoss and his son and former Union Minister Anbumani following the Marakkanam violence on April 25.
Ramadoss had been arrested after he failed to wind up a PMK function which was blamed by Chief Minister J Jayalalithaa as the reason for the violence at Marakkanam in Villupuram district which was allegedly targeted against Dalits.