The Scottish town of Lockerbie is marking the 25th anniversary of the bombing of Pan Am Flight 103.

Lord Wallace, the Advocate General of Scotland lays a wreath during the memorial service in Dryfesdale cemetery to commemorate the 25th anniversary of the air disaster in Lockerbie, Scotland ( Ian Forsyth/Getty Images)

Bagpipes played and wreaths were laid in memory of the 270 people who died on Dec. 21, 1988. Relatives of some of the victims gathered at Lockerbie's Dryfesdale Cemetery, laying down wreaths and cards and pausing for a moment's reflection before a memorial stone.

Later today, senior Scottish officials will attend a service at London's Westminster Abbey. In the United States, U.S. Attorney General Eric Holder and other officials will speak at a ceremony at Virginia's Arlington National Cemetery.

The plane exploded over Lockerbie less than an hour after taking off from London on the way to New York. Many of the victims were American college students flying home for Christmas.

Only one man, former Libyan intelligence oficial Abdel Baset al-Megrahi, was convicted of the bombing. He was given a life sentence, but Scottish authorities released him on humanitarian grounds in 2009 when he was diagnosed with prostate cancer. He died in Tripoli last year.

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