A US Airways passenger jet traveling from Charlotte to Charleston, W.Va., has had to turn around and make an emergency landing.

An airline spokeswoman says the crew heard a "loud and unsettling noise" shortly after the plane departed at around 2:30 p.m. EST Sunday. As a precaution, the plane turned around and landed at Charlotte/Douglas International Airport about an hour after it left.

The 44 passengers were then put on different flights. It was unclear what caused the noise and the airline was investigating.