Three army officers were killed and a junior commissioned officer was critically injured on Wednesday when a Cheetah helicopter crashed at Sukna Military Camp in West Bengal. <br/><br/>Army officials said the chopper crashed around 11.45 AM when it was returning to the camp's helipad at Sukna, near Silgirui, from a routine mission. While three officers died on the spot, a Junior Commanding Officer (JCO) was evacuated and admitted to a hospital in a critical condition. <br/><br/>The army's 33 Corps is based at Sukna and all aircraft of the Army are run by Army Aviation Corps. <br/><br/>A Court of Inquiry has been ordered into the incident.