Two contract labourers died, while three others were injured when a wall in a dilapidated building collapsed on them at Vaddipa village of Rolugunta mandal in Visakhapatnam district on Monday afternoon. The condition of three injured is also said to be critical. The deceased were identified as Lanka Ramu Venkata Nageswara Rao (32) and his uncle L. Janampatrudu (51), both contract labourers from Vaddipa village.