BRUSSELS: A cyberattack on a provider of check-in and boarding systems on Saturday disrupted operations at several major European airports including London`s Heathrow, the continent`s busiest, causing flight delays and cancellations.

Collins Aerospace, which provides systems for several airlines at airports globally, experienced a technical issue that caused delays for departing passengers, Heathrow said.

Brussels Airport and Berlin Airport were also affected. Collins Aerospace`s parent company, RTX, said it was aware of a `cyber-related disruption` to its MUSE software at selected airports.

Hours later, Dublin Airport said it was also facing minor impact from the issue, along with Cork Airport,Ireland`s second biggest after Dublin.

Electronic check-in impacted `The impact is limited to electronic customer check-in and baggage drop and can be mitigated with manual check-in operations,` RTX said in an emailed statement. It did not give any information on who might be behind the attack.

At Heathrow, Berlin and Brussels, 29 departures and arrivals were cancelled. In total, 651 departures were scheduled from Heathrow, 228 from Brussels and 226 from Berlin on Saturday.

The disruption is the latest in a string of increasingly sophisticated cyber and ransomware attacks targeting governments and companies across the world, hitting sectors from healthcare and defence to retail andautos. A recent breach at luxury carmaker Jaguar Land Rover brought its production to a halt.

Ro b Jardin, chief digital officer at cybersecurity experts NymVPN, said the incident highlighted the vulnerability of critical infrastructure when it relies on third-party suppliers.

`Increasingly, hackers are not just criminals but are being weaponised by hostile nation states against Europe, with supply chains seen as an easy way to cause chaos.

Delays and cancellations Germany`s federal office for information security said it was in touch with Berlin Airport over `infrastructure disruptions` as a resultofanoutage affectingaglobal system for handling passengers.Britain`s National Cyber Security Centre said it was working with Collins Aerospace and affected airports to fully understand the incident`s impact.

Brussels Airport said on its website it was having to use manual check-in and boarding procedures, adding the incident occurred on Friday night. `This has a large impact on the flight schedule and will unfortunately cause delays and cancellations,` it said.

The airport said that 10 flights had been cancelled so far, with an average delay of one hour for all departing flights.

Passengers left in the dark Passengers with a flight scheduled for Saturday were advised by the affected airports to confirmtheir travel with airlines before heading to the airport.

Tereza Pultarova, a journalist, spoke to BBC News from inside Heathrow, where she was due to fiy to Amsterdam at 0530 GMT for a connecting flight to Cape Town.

`Unfortunately, the airline I`m with ... they don`t have a service desk here, so we`ve been left in the dark,` she said. `It`s been great chaos, and it`s been quite ... frustrating for most people here.

Berlin Airport said on its website that there were longer waiting times at check-in and it was working on a quick solution. Frankfurt Airport, Germany`s largest, was not affected, aspokesperson said.

At Berlin Airport, Kim Reisen said there was a lack of clarity, with passengers only informed that therewas `a technical fault`.

Another traveller, Siegfried Schwarz, said: `I ... find it inexplicable that, with today`s technology, there`s no way to defend yourself against something like that.

EasyJet, among Europe`s biggest airlines, said it was operating as normal and did not expect the issue to impact its flights for the rest of the day.

Delta Air Lines of the United States said it expected minimal impact, adding it had implemented a workaround to minimise disruption.

United Airlines said the issue was `causing minor departure delays`, but it had not cancelled any flights.

British transport minister Heidi Alexander said she was receiving regular updates on the situation.

-Reuters