Public transport like buses and train services plied as usual even as educational institutions remained open, police said, adding, no untoward incident has been reported.
Although the AIADMK government has not declared a holiday for educational institutions, some of them remained closed with the respective managements taking a decision in this regard.
Even where schools were open, poor attendance was reported. Although, government and aided schools functioned normally.
Commercial establishments, including petrol stations, many of which had closed last night following a setback in the Chief Minister's health, largely remained open, police said.
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68-year-old Jayalalithaa was admitted to Apollo Hospital on September 22 after she complained of fever and dehydration, and later treated for infection and respiratory problems.
Yesterday, she suffered a cardiac arrest. She has been put on extra corporeal membrane oxygenation (ECMO), a heart assist device, and is at present under the watch of experts, including cardiologists.
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Meanwhile, a Cuddalore report said security has been strengthened at Neyveli Lignite mines and Thermal power stations.
No untoward incidents have been reported, Cuddalore district SP C. Vijayakumar said.
Five Karnataka state owned buses have been parked in the Tamil Nadu Transport Corporation sheds as they did not ply to Bengaluru, he said.
AIADMK workers and supporters offered mass prayers for Jayalalithaa's recovery in temples including the Nataraja shrine at Chidambaram.
A Coimbatore report said buses, taxies and autorickshaws plied as usual in the morning, and educational institutions remained open.Almost all shops and traders opened their business establishments.
However, around three PM, several private buses, taxis and autorickshaws stopped plying and school managements allowed the parents to take their wards from the schools.
The City police commissioner warned of stringent action against those who indulged in spreading unnecessary rumours on the chief minister's health condition.