Residential rental yields in Dubai and Abu Dhabi could indicate growing imbalances and overheating in the country's real estate sector, the United Arab Emirates central bank said on Sunday, in the first official warning about soaring property prices.

"Current average rental yields in Dubai and Abu Dhabi are approximately 70 and 130 basis points below historical averages, which could indicate growing imbalances - overheating real estate market," it said in an annual financial stability report.