Police evacuated part of a terminal at Frankfurt Airport. An unauthorised person enters security area.

German police evacuated some parts of a terminal at Frankfurt Airport, Germany's biggest, on Tuesday, (Aug 7), over concerns that at least one person may have entered the facility's security area unchecked. Federal police said they stopped boarding in area A of the airport's Terminal 1 and were clearing the security area. "At least one unauthorised person has entered the security zone," a spokesman for the federal police told Reuters. Police spokeswoman Julia Thiel told: "there were indications that at least one person entered the security area in area A without authorization, and so we have to clear the security area." While the spokesman for Germany's federal police, Reza Ahmari, added that controls were being carried out on all people in the security zone and that boarding would resume the checks had been completed. German airline Lufthansa, whose main hub is in Frankfurt, said on Twitter that it could not yet say how many flights might be delayed or cancelled as a result of the evacuation. It wasn't immediately clear how many people were affected On July 28, some 300 flights were cancelled at Munich airport, Germany's second-biggest after Frankfurt, affecting more than 30,000 passengers, after a similar incident in which a person passed through the security area without being checked. This story is still developing.