KUALA LUMPUR, July 19 -- A worldwide IT disruption is causing chaos with transport services, especially airlines, including in Malaysia.

Here is a list of airlines and other services that have confirmed to be affected by the Microsoft and CrowdStrike disruption so far.

Affected:

1. AirAsia - Reservation and check-in system affected. Customers may experience slower check-ins and longer queues.

2. Firefly Airlines - Booking system outage. Customers unable to book flights, manage bookings, check-in online now.

3. Rail service provider KTMB - Ticketing system and complaint channels at customer service centre affected.

4. Rail service provider KLIA Ekspres - Cannot book tickets online or using app or digital wallets. Customers must buy t...