According to media reports, around 30 flights were targeted in a single day, forcing some aircraft to make emergency diversions while others were escorted by fighter jets as a precaution.

The threats reportedly affected flights travelling to Prague, Paris, Rome, Brussels, Milan and Sofia.

In France, an Aer Lingus flight travelling from Dublin to Rome was intercepted by fighter jets and diverted to a military airbase. In Bulgaria, three passenger aircraft were safely brought to the ground with the assistance of fighter jets.

Meanwhile, in Poland's capital Warsaw, a LOT flight bound for Paris was stopped before take-off following a bomb threat.

Several flights were also subjected to security searches in Spain as authorities responded to the reported threats.

Officials have so far been unable to identify any country or group responsible for the incidents.

Security experts have suggested that the incidents could be part of coordinated hybrid attacks, although no definitive evidence has established a link between the threats.

European countries have previously accused Russia of engaging in sabotage and hybrid operations across the region. Moscow has repeatedly denied the allegations.