The injured Kalicharan Pujhar (28), Manjunath (33) and Vikash Kumar (18) of Jharkhand had been engaged by a contractor to construct a building inside the IIT campus near Velachery gate. 

Around 11.30 am, the workers were removing a 20-litre paint container when it fell from a height and exploded. 

The injured workers were rushed to the Government Royapettah Hospital, and Kalicharan was shifted to the Government Stanley Hospital. Kotturpuram police have registered a case. It is suspected that the gas accumulated in the container might have triggered the explosion. Further investigation is on.

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