The observation deck of Dubai's Burj Khalifa, the world's tallest tower, was shut down today due to problems with power supply, a statement said.

"Due to unexpected high traffic, the observation deck experience at the Burj Khalifa... has been temporarily closed for maintenance and upgrade," the management said in the statement.

"Technical issues with the power supply are being worked on," it added.

The 828 metres (2,717 ft) tower was about a month ago.