According to sources four slabs of 20 meter length was collapsed. The mishap took place in the night and all labourers had left place by the time.
If the mishap taken place during day time it would have been a major tragedy as hundreds of labourers were working there.
The four-lane bridge on the Outer Right Road on Chennai-Hyderabad Highway was under construction for the last one year.
Meanwhile, Telugu Desam Party (TDP) leaders alleged substandard materials were being used in the construction of the bridge leading to the collapse.