All flights into Philadelphia International Airport were halted for less than an hour on Friday morning after two planes reportedly were forced to make emergency landings.
"FAA has issued ground stop due to aircraft emergency at PHL," the airport posted on Twitter at 8:31 a.m.
Shortly after 9 a.m., a tweet from the Federal Aviation Administration said, "@PHLairport re-opened, air traffic delays expected as arrivals/departures resume with one runway operational."
The FAA temporarily closed the airport "due to an emergency evacuation on the runway," it tweeted.
The move came after two planes made emergency landings, one with smoke in the cockpit and the other with steering problems, FOX 29, the Fox affiliate in Philadelphia reported.
An airport spokesperson did not immediately respond to a request for comment.