WASHINGTON (AP) — U.S. military officials have grounded all F-35s while continuing to investigate a runway fire involving one of the fighter jets at Eglin Air Force Base in Florida.

In a statement issued Thursday, the Pentagon’s press secretary said Air Force and Navy officials ordered the F-35 fleet grounded after initial findings in the incident in Florida on June 23.

Officials said at the time that the jet caught fire during takeoff at Eglin Air Force Base. No one was hurt, and the cause remains under investigation.

The Pentagon says that additional inspections of F-35 engines have been ordered, and that the return to flight of the F-35 fleet will be determined based on inspection results and analysis of engineering data.

Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.