In France, four more planes made an emergency landing due to bomb threats. Four passenger planes made an emergency landing in France after reports of possible explosive devices on board. Three planes landed at Orly airport in Paris, another plane in Bordeaux. All landings were made without incident. The planes are being checked by explosive ordnance squads, and law enforcement authorities are finding out who is behind the reports of the threats. "An investigation is underway to determine the source of these threats, which affected all of Europe," the French Prime Minister's Office said. The day before, November 5, more than a dozen passenger flights across Europe were also forced to make emergency landings due to reports of bombs. Initial tests did not turn up explosive charges. One of the planes, flying from Dublin to Rome, landed at a French military air base near Havre, escorted by fighter jets. Later, an investigation was opened against the pilot: he initially refused to obey the instructions of the traffic inspectors to land at a military base and asked for permission to land at a civilian airport.