|Thanks to @MuminKhaifi for the picture|
Breaking news, a PIA (Pakistan International Airlines) aircraft landed earlier today on one of the 2 main runways at Muscat International Airport (MCT). Upon landing, one of the landing gears collapsed on the plane which has disabled it on the runway, effectively shutting that runway.
A quick look on the MCT website shows that many incoming and departing flights are delayed. There is a second runway at MCT but I don't know how long it is, and if it's long enough for the bigger planes to land and take off.
So if you have to take a flight today, check well before you leave for the airport, it's likely going to be delayed!