ANCHORAGE, Alaska (AP) — Authorities launched a search Tuesday for a medical helicopter that vanished while carrying a patient and medical crew.

The LifeGuard Alaska helicopter, which was heading from Cordova to an Anchorage hospital, disappeared Monday sometime after 5:18 p.m., authorities said. The helicopter crew had made a satellite phone call around that time, but it was not a distress call, said Coast Guard Lt. John McWhite.

A patient, pilot, paramedic and nurse were aboard, said Providence Alaska Medical Center spokeswoman Becky Hultberg.