( CNN ) -- Melbourne airport was hit with a power outage on Wednesday , temporarily grounding outgoing flights and bringing other airport services to a halt . At 9:31 a.m. local time , the Australian airport posted on its official Twitter account that a `` major power outage has affected airport operations . '' While the blackout lasted only an hour , according to the Age , it caused chaos in airport procedures and consternation among passengers . Aside from flight delays , customs processing was halted , security gates were closed , and shops could not conduct sales . Eventually , both security and customs began processing passengers manually , with security staff examining luggage manually . ''It 's pretty frustrating . People are just sitting around and looking pissed off . Everyone has basically given up on their day , '' a woman named Ms. Hamilton told the Age . Passengers on incoming flights were also kept waiting , including ABC News correspondent , Jen King . `` Everyone was sitting around in the dark , '' she said . `` Then we made our way out . But of course once we went past the security it looked a nightmare . '' `` It was just packed with people . `` [ We went ] downstairs to the luggage area which was a bit of a fiasco as well because none of the carousels were working . Flights eventually came back into operation , according a tweet posted at 11:08am local time by Melbourne Airport . Airlines have reported different impacts on their flights , ranging from Qantas , whose spokeswoman told the Age that back-up power allowed its services to remain running , while Virgin Australia tweeted there would be some `` minor delays . '' It remains unclear what caused the power outage .
Melbourne airport experienced power blackout on Wednesday morning local time . Blackout lasted about an hour , with flights grounded and passenger processing halted . Comment: