KATHMANDU: At least six persons were injured when a bus collided with a tractor head-on at Janata Chok in Chitwan on Friday evening. Three of the injured are said to be in critical condition.

Police said the bus (Na 5 Kha 7153) collided with the tractor (Na 4 Ta 207) coming from opposite direction at around 6:45 pm yesterday.

Three of the critically injured were referred to Bharatpur for further treatment, while others at a local hospital in Madi of the district.