(AP) — The Federal Aviation Administration is investigating what caused a GoJet Airlines plane to slide off a taxiway at Lambert St. Louis International Airport.

GoJet says none of the plane’s 60 passengers or four crew members was injured during the accident shortly before 7 p.m. Sunday involving the flight from Chicago’s O’Hare International Airport.

GoJet says the Bombardier CRJ700 plane was safely off the runway and on the taxiway approaching a Lambert terminal when the plane’s nose gear became stuck in mud.

Buses were used to transport the plane’s passengers to the terminal.