Officials at Britain's historic Wembley Stadium have been forced to change the locks after police lost a set of keys.
Games organisers were left red-faced by the blunder and LOCOG spokeswoman Jackie Brock-Doyle gave a curt reply to the question at a media conference.
"I'll start with the keys; they're lost. We changed them. No one's looking for them anymore," she said.
Wembley was also beset with problems with its electronic payment system, which only accepts Visa cards as part of a sponsorship deal with the IOC.
"I would simply say it actually was a Wembley arena system (issue), nothing to do with the Visa system," IOC spokesman Mark Adams said.
"Visa themselves are a partner who contributes an awful lot to the Olympic movement and we're very pleased that we can use those funds for athletes and NOCs (national Olympic committees) around the world; that's what they are for."
The Games may only be days old but there have been a number of teething problems.
The first, and biggest, was the failure of security contractor G4S to train enough staff forcing the government to bring in thousands of soldiers to fill the gaps.
The sight of empty seats in stadiums due to sponsors and sport governing bodies not using their allocated tickets has also caused controversy.
On the first day of women's soccer tournament, the North Korean team was infuriated by the flag of South Korea being displayed on a replay screen next to a photo of one of its players, leading to an official apology from LOCOG.
Even the much-celebrated Opening Ceremony was not immune.
A without being challenged, despite being dressed in jeans and a red hoodie.
But despite the hiccups, organisers say they are pleased with how the Games are running and are getting positive feedback from the public.