In a statement, Chief Minister O Panneerselvam expressed grief over the deaths and said best medical treatment has been ordered to be given to those injured in the acccident.
He also announced a solatium of Rs 50,000 for the severely injured and Rs 25,000 who sustained minor injuries.
State Transport Minister V Senthil Balaji and Higher Education Minister P Palaniappan are supervising the medical treatment given to those injured.
The mishap occured when the bus attempted to take a sharp turn near a temple and fell into the gorge, they said.