LONDON (AP) -- An official says already tight restrictions on private jets and microlights flying over London will be expanded during the Olympics.
Paul Haskins runs the London terminal controls of the National Air Traffic Services.
He said Sunday that the zone surrounding London from which private planes, hot air balloons and microlights are banned will increase by up to 30 miles in all directions. The restrictions are for security reasons and to minimize the chances of a crash between a private plane and a jumbo jet.
The monthlong restrictions come into force on July 16.
Haskins says unauthorized aircraft straying over London during that time could be seen as a threat by the Ministry of Defense.
Some 4,000 extra flights are expected to come into the U.K. for the games.