Story highlights Device that prompted emergency landing in Kenya was not a bomb, airline says

It was a cardboard box containing papers, with "something like a kitchen timer," Air France says

(CNN) Authorities are questioning four people after a suspicious device was found in the restroom of an Air France flight, prompting an emergency landing in Kenya on Sunday.

The four were all aboard Air France Flight 463, a Boeing 777 headed to Paris from the island nation of Mauritius.

It was diverted to the coastal city of Mombasa after the device was found, said Joseph Nkaissery, Kenya's interior minister. He did not disclose the nationalities of the four people.

The object was analyzed and found to contain no explosives, the airline said.

Air France CEO Frederic Gagey described the object as a cardboard box containing papers, with "something like a kitchen timer" inside it.

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