Some flights at the Philadelphia International Airport (PHL) were forced into a ground stop because of an obstruction near the runways, officials said.

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The Federal Aviation Administration issued the ground stop because it was reported that there was a ship in the Delaware River that was blocking the view as pilots were approaching the PHL runways, according to a spokesperson with the airport.

A tug was able to move the ship, officials said.

This is a developing story. Check back here for updates.