A search is under way in southern Colorado's San Juan Mountains for a missing medical plane that crashed near Alamosa with three people aboard. Federal Aviation Administration spokesman Mike Fergus says flight controllers last had radio and radar contact with the twin-engine Beech King Air C-90A at about 11:20 p.m. Thursday. Glendale-based HealthONE spokeswoman Leslie Horna says the Eagle Air Medical plane was based out of Chinle, Arizona. Horna says a search and rescue effort is under way, but weather at the suspected crash site is unfavorable. Those aboard the plane were the pilot, a flight nurse and a paramedic.