The director of Interpol said Thursday there is no specific intelligence the 2012 Olympics will be targeted.
Ron Noble, secretary general of the international police agency based in France, also said that Britain does a good job of screening identification documents against the Interpol database as part of its security procedures.
But he said the UK does not have enough immigration officers.
London is hosting the Olympics this summer.
Olympics security has been a primary concern since 1972, when 11 Israeli athletes and coaches were killed at the Munich Games.
A special Interpol support team will be sent to Britain for the Olympics, specifically to help authorities check whether people have travelLed on stolen passports and documents and if they pose a threat.
The UK Border Agency faced intense criticism last year after passport checks were relaxed during the height of the summer tourist season to lessen lines at London's Heathrow Airport.
A government report issued Thursday blamed poor communications, lack of supervision and other shortcomings for the problems.