From the AVHerald:
'According to ATC recordings the aircraft performed a normal approach and landing, there was no priority or emergency declared. Upon contacting tower tower reminded the crew of lowering the gear and cleared the aircraft to land. Another approach reported on tower frequency.
About 2 minutes after EK-521 reported on tower tower instructed the aircraft to climb to 4000 feet (no go-around call heard from the crew), the crew acknowledged climbing to 4000 feet, a few seconds later tower instructs the next arrival to go around and alerts emergency services. The position of the aircraft is described near the end of the runway.'