EK614 arrived into ISB early this morning, while preparing for departure as EK-615, what looks like a catering truck (correction: was a Gerry's dnata ambulifter) has damaged the engine cowling.
A replacement 777-300 A6-EMT (oh how the disappointed the pax must've been) was dispatched to fly the passengers and crew over.
The EK source refers to it as a technical issue right now:
Emirates B777-300ER A6-END Islamabad Technical Issue. | The EK Source
The pictures are NOT mine, you can see them at:
http://instagram.com/planespotters.islamabad
The current photo shows what looks like a truck that's fallen over, and the instagram story uploaded by the account has a picture of the cowling itself.