"It is a man-made disaster which is the result of corruption by TMC leaders. The Chief Minister knows this very well and that is why she is trying to hush up the matter," Chowdhury said at a programme here.
Those involved in the corruption, whoever big he may be, should be arrested immediately, the state Congress chief said.
About 60-metre-long portion of an under-construction flyover collapsed last afternoon on a congested road intersection here killing at least 24 people.
Sudip Bandyopadhyay today argued that the then Left Front government had pursued a "faulty plan" for the flyover and when the complaints were received 60 per cent of the work had already been completed.
