Security at the Hong Kong Stadium was questioned yesterday after a businessman bungee-jumped from its east tier.
Director of American company Bungy Zone Adventures, Paul Boyle, 25, climbed 51 metres to the stadium roof and then set up his bungee line.
Moments later, at about 11 am, he jumped, completing the territory's first bungee jump.
But the Urban Services Department has banned bungee jumping from its facilities and now Urban Councillors are demanding to know how Mr Boyle was allowed to perform his stunt, with the media on hand to record the feat.
Stadium managers Wembley International admitted allowing Mr Boyle into the arena but said no authority was given for the jump. A spokesman said the incident was under investigation.
'This is quite a shock, I think Wembley should really learn a lesson from this,' said Democratic Party stadium spokesman Fred Li Wah-ming.