Police carried out a controlled explosion to open the door of a car parked near the Stade de France, about three and a half hours before the stadium was due to host France's quarterfinal match against Iceland.
Police said the car was parked in an area where it shouldn't have been.
Security has been tight throughout Euro 2016 and particularly at the Stade de France, which was targeted by suicide bombers during the attacks across the Paris area on Nov. 13, 2015 that killed 130 people.