The incident occurred this morning at 8:30 AM when the labourers were working at the construction site of Jaipur Development Authority (JDA) near Science Park in the city, they said.
The labourer is feared dead. However, four cranes and two JCB machines were pressed into action to recover him, police said.
The construction site was very delicate as it leads to Aminashah Nullah and any further damage to the mud or concrete can be risky for the trapped labourer and entire bridge area, they said.
