After receiving massive complaints from delayed passengers around the world, Delta Airlines admitted on Twitter that their computer systems have gone down worldwide.

Airports all over the globe are experiencing delays. Reports indicate that Heathrow Airport in the UK has resorted to manual ticketing in order to organize the growing number of waiting passengers.

In one reply to travellers, the airline stated: “Yes, we’re currently experiencing system issues and working to get thing [sic] back on track”.

@Jessb6484 Hi there. I am really sorry for the inconvenience. Our systems are down everywhere. Hopefully it won’t be much longer. *SD

— Delta (@Delta) 8 באוגוסט 2016

1 hr.+ lines @HeathrowAirport for @Delta due to system outage #Heathrow #oldschool manual ticketing @DeltaAssist pic.twitter.com/syC0VwCBDD

— Jake Chen (@MITJAKE) 8 באוגוסט 2016

@Delta – massive system failure worldwide, all planes grounded. No passengers being checked in. #cluster #shitshow pic.twitter.com/b3nEuMaS9G

— Bobby Digital (@ghostdog310) 8 באוגוסט 2016

This is a developing story.