Authorities have closed the road link following the collapse of the portion of the bridge.

The incident occurred when labourers were carrying out repair work on a retaining wall near the bridge that was damaged in last year's flash floods.

A section of the bridge suddenly gave way, burying workers engaged at the site under the rubble.

Police, Army and State Disaster Response Force (SDRF) teams launched rescue operations to extricate those buried under the debris. They pulled out one injured labourer and shifted him to a hospital.

Family members of the labourers present at the site said around six workers engaged at the site at the time of the incident came under the debris when the structure collapsed. The family members said while two of the labourers managed to escape, four got trapped.