Workers were laying overhead wires for the tower when it suddenly fell on four persons, inspector Bhupendrasinh Sarvaiya of Khambhaliya police station said.
He said one of the labourers died on the spot, and another succumbed at a nearby government hospital.
Two others were grievously injured and have been rushed to the civil hospital at Jamnagar for treatment, the official said.
He said the labourers hailed from West Bengal, and their identities were being ascertained. PTI COR KA ARU