A crane operator and a labourer were killed on Friday and three others injured after a tower crane collapsed after colliding with a stationary one at a construction site in Ganeshpeth, when workers were raising the height of the 100-foot-tall crane, said police. Two workers died and two were injured when a crane collapsed during dismantling at an under-construction MHADA building in Nagpur on October 30. Police identified the deceased as Vishwanath.