The bird was put behind bars after a man fishing in the Nile in Qena, some 280 miles south-east of Cairo, spotted an electronic device attached to its feathers.
Thinking it was an undercover agent, he captured the stork and took it to a police station near his home, said Mohammed Kamal, head of security in the Qena region.
Puzzled officers examined the bird, fearing the gadget was a bomb or spying equipment, and then called in veterinary experts.
Eventually, they discovered it was a wildlife tracker used by French scientists to follow the movement of migratory birds, said Ayman Abdallah, head of veterinary services in Qena.
He said the device stopped working when the bird crossed the French border, absolving it of being a spy.
But he said it would have to remain in police custody for the time being because officials need permission from state prosecutors to release the bird.
Commentators said that with turmoil gripping Egypt following the military coup that overthrew President Mohammad Morsi, authorities and citizens remain on high alert.
Earlier this year, a security guard filed a police report after capturing a pigeon he said was carrying microfilm.
In 2010, a series of shark attacks along Egypt’s Mediterranean coast were blamed on “GPS-controlled sharks” allegedly sent by Israeli security services into Sinai waters.Post published in: News