However, no one was injured in the incident.
Miscreants hurled the bottle filled with kerosene which landed on the pathway, resulting in a fire, City Police Commissioner AK Viswanathan told PTI.
"The fire was immediately put out and none suffered injuries," he said.
Viswanathan, who visited the spot along with senior officials, said a probe was on into the incident and that they were looking into different angles as part of the investigation.