At least seven planes were security-screened at several European airports on Tuesday after suspected bomb threats were reported. Emergency procedures were launched in Poland, Spain and Bulgaria because of the incidents, with four planes touching down at airports in the countries concerned.

The BBC said two aircraft were checked in Warsaw, one in Murcia, Spain, and a fourth reportedly landed in Sofia, Bulgaria. The threats prompted security responses at several locations but authorities have not yet identified their origin or precise nature.

Spanish authorities clear Manchester flight after inspection

One of the planes involved in the incident touched down at Región de Murcia International Airport following a flight from Manchester. Spanish authorities confirmed, after a thorough security inspection, that no explosives were found on board.

Francisco Lucas, the Spanish Government’s delegate for the Region of Murcia, confirmed on X that security protocols had been triggered after a bomb threat on the Manchester flight.

In a later statement, he said the Guardia Civil had ruled out the presence of explosives after completing its inspection.

He also vowed that normal airport operations would resume and thanked the emergency response teams involved in the operation.

Warsaw airports also hit by security alerts

The threats were reported and security checks were conducted on two planes in Warsaw, Poland. One incident involved a LOT Airlines flight from London Heathrow (LHR) to Warsaw Chopin airport.

Instead of its original destination, the aircraft was diverted to Warsaw Modlin Airport and landed at around 09:00 GMT, data published by flight-tracking platform FlightRadar24 showed.

Passengers were evacuated while the plane was being checked for security, Adam Szablowski, a spokesman for Modlin Airport, told Agence France-Presse.

No explosives were found and the airport was reopened and returned to normal operations, he said.

Rome investigates Ryanair flights

Security checks were also held at Rome’s Fiumicino airport. Two other Ryanair flights from Lisbon and Dublin were searched and investigated after anonymous reports of possible bomb threats, airport sources said, according to the BBC.

Both aircraft were given security checks. Following the mandatory safety procedures, no explosives were found.

Threat source still unknown

Inspections have been carried out at the various airports, but the exact nature and source of the threats are not confirmed. Authorities say they don't know who made the warnings or whether the incidents are related.

There is also no current indication that the suspected threats were related to belly cargo carried on any of the affected flights.

The situation is still developing and further information is expected as investigations continue and airport authorities examine the incidents.

This is a breaking news story. More information will be posted as it becomes available.