ALLENTOWN, Pa.—A small airplane crashed into an eastern Pennsylvania cornfield shortly after takeoff, but authorities say the two men aboard were not seriously injured.

The Piper Cherokee aircraft had taken off Friday evening from Lehigh Valley International Airport near Allentown.

The Morning Call reports witnesses heard a sputtering sound before the plane went down.

Emergency responders were searching woods and fields for the wreckage when the pilot and co-pilot walked out onto a nearby road.

Airport spokeswoman Susan Kittle says an investigation will be conducted.