The labourers, Laluram (20) and Dalchand (30), died on the spot yesterday when the roof collapsed on top of them, police said.
Out of the five injured persons, two have been hospitalised in Udaipur and three are undergoing treatment in a Bhilwara hospital, they said.
A case have been registered under IPC section 304A (culpable homicide not amounting to murder) against the contractor Kamruddin, the police added.