More than 100 passengers stranded for six hours on the world's largest ferries wheel were being evacuated and given medical treatment in Singapore after the attraction ground to a halt on Tuesday.

A passenger of the Singapore Flyer observation wheel is repelled down from a capsule during a rescue operation in Singapore December 23, 2008. More than 100 passengers stranded for six hours on the world's largest Ferris wheel were being evacuated and given medical treatment in Singapore after the attraction ground to a halt on Tuesday.[Agencies]

A passenger is lowered on the rope after the world's largest observation wheel, the Singapore flyer, grounded to halt in Singapore, December 23, 2008. More than 100 passengers stranded for six hours on the world's largest ferris wheel were being evacuated and given medical treatment in Singapore after the attraction ground to a halt on Tuesday.[Agencies]

The Singapore Flyer stopped working after a short circuit in one of the wheel's motor drivers cut its power supply, a company spokeswoman said.

There were 173 people, including many tourists, trapped inside the huge tourist attraction.

The wheel started turning again more than six hours later and passengers were ushered into ambulances, a Reuters witness said.

The spokeswoman for the Flyer said the stranded passengers were given water and food throughout their ordeal.

Standing at a height of 165 metres (541 feet), the Flyer started operations in the city state in February and is 30 metres (98 feet) taller than the London Eye.

It has 28 bus-sized capsules attached to a circular frame 150 metres (492 feet) in diameter. Each capsule can accommodate 28 people.

The Flyer is part of Singapore's drive to boost tourism revenues.

Editor: Yan