Five persons were killed and five others critically injured when a van collided with a tractor-trollery here in Haryana on Tuesday, the police said.The Cruiser Force van they were travelling in first collided with a tractor-trolley carrying fodder and then with a TATA 407 vehicle on Rewari-Mahendragarh road here, police official Satbir Singh said.The victims were employed at a private firm and belonged to nearby villages.According to Singh, four persons died on the spot while one succumbed to his injury on the way to a trauma centre. The injured have been admitted to the trauma centre.