Illegal luggage searches could have been conducted by border officials at one of Britain's busiest airports, without the passengers' knowledge.
Over 1,000 pieces of luggage were seized at Birmingham Airport in the year to September.
However, Chief Inspector of Borders and Immigration John Vine said there was no record of the instances in which these searches did not result in a successful seizure.
Because of this, there is no way of knowing the total number of searches conducted in the period, and whether border staff were breaching passengers' rights.
More top news
A group of friends in Haverhill have left one of their mates with a fractured spine after a prank with a home-made ejector seat went wrong
Temperatures will remain low for most of the country as Britain battles against wintry showers, snow and gales this afternoon.
A giant panda has been caught in camera breaking iron bars and moving into the other cell to have a taste of milk in the next cell.