( CNN ) -- A medical helicopter crashed on its way to pick up an ailing child in southwestern Tennessee Tuesday morning , killing the pilot and two Memphis children 's hospital workers , officials at the hospital said . The helicopter crashed around 6:20 a.m. near Somerville , about halfway between Memphis and the crew 's destination of Bolivar , officials at Memphis ' Le Bonheur Children 's Hospital told reporters Tuesday morning . Killed were registered nurse Carrie Barlow , 43 , of Halls ; respiratory therapist Denise Adams , 43 , of Arlington ; and pilot Charles Smith , 47 , of Eads , according to the hospital . The crew planned to pick up a boy who was in renal failure at a Bolivar hospital and take him to Le Bonheur , but the helicopter never reached the destination , Le Bonheur CEO Meri Armour said . Aerial video of the crash site from CNN affiliate WMC showed smoke rising from wreckage in a wooded area . Officials said they did n't have information about what led to the crash . `` They have taken care of so many kids in their short lives , '' Dr. Jay Pershad , medical director of Le Bonheur 's air transport program , said of the crew Tuesday . `` I ca n't tell you how incredibly difficult it is for the entire team . '' Medical helicopter crashes kill 3 , hurt 4 and prompt more scrutiny . The boy who was supposed to be flown to Memphis was taken by ambulance to Le Bonheur Tuesday morning after officials learned of the helicopter crash , Armour said . The fatal crash is the second in roughly three years for Hospital Wing , the air ambulance service that operated the helicopter , company CEO Bill Conway said . In March 2010 , three people died when a Hospital Wing helicopter crashed near Brownsville , Tennessee , authorities said at the time . In that 2010 crash , the helicopter was returning to Brownsville after dropping off a patient in Jackson , officials said . It 's unclear what led to Tuesday 's crash , Conway said , adding that the Federal Aviation Administration and the National Transportation Safety Board will investigate . `` It saddens me more than you can know . All three of these crew members were personal friends of mine , '' he said . Hospital Wing serves hospitals in Tennessee , Arkansas and Mississippi , transporting about 150 patients a month , the company 's website says . Le Bonheur Children 's Hospital staff members go on about 400 helicopter flights a year , Pershad said . Medical helicopter crashes after taking patient to hospital . Medical helicopter crash kills 1 .
Registered nurse , respiratory therapist , pilot killed . Helicopter was scheduled to pick up ailing boy , take him to children 's hospital . The helicopter crashed about halfway between Bolivar and destination of Memphis . It 's the second fatal crash since 43 for the Federal Aviation Administration helicopter service .