A major tragedy was averted on Friday when an Air India and a Nepal Airlines aircraft came close to collision mid-air but the warning systems alerted the pilots whose timely action prevented the disaster, authorities said here on Sunday. The Civil Aviation Authority of Nepal (CAAN) has suspended three employees of the air traffic controller department for “carelessness” during duty hours, according to CAAN spokesperson Jagannath Niroula. On Friday morning, an aircraft of the Nepal Airlines coming to Kathmandu from Kuala Lumpur, Malaysia and an Air India plane coming to Kathmandu from New Delhi almost collided. Both aircraft were Boeing A320 with the capacity of around 150 passengers.