Large numbers of U.S. diplomats canceled seats on Pan Am flights in the weeks before the bombing of Flight 103, according to a U.S. congressional panel that saw internal Pan Am documents, a British newspaper reported Wednesday.

The Independent, a respected daily, said documents sent to a House of Representatives panel probing the Dec. 21 bombing show that Christmas holiday traffic for U.S. embassies had been heavily re-booked prior to the bombing.The report noted that relatives of those who died in the bombing have been angry that warnings of a possible bombing of a Pan Am flight from Frankfurt to the United States were not made public.

All 259 people on Pan Am Flight 103 and 11 on the ground were killed when the New York-bound Boeing 747 was blown up over the Scottish town of Lockerbie. The flight had originated in Frankfurt, West Germany.

The U.S. government has denied that its officials, acting on the warnings, had thus avoided Pan Am flights, the report said.