Adelaide Airport was evacuated due to a security breach in the main terminal around 11am, leading to re-screening of passengers and potential flight delays. Meanwhile, EuroAirport, located near Basel, Mulhouse, and Freiburg, was evacuated and then reopened following a bomb threat, just hours before the Paris Olympics opening ceremony. The airport evacuation came amid heightened security concerns in France, which also saw major disruptions in its high-speed rail network due to arson attacks. French authorities are on high alert to prevent any potential threats during the Olympics. There are speculations that these coordinated attacks could be linked to external influences, including possible Russian involvement.