Memorials in US, Scotland, London to mark 25th anniversary of Lockerbie attack

Floral tributes are seen near the main memorial stone in memory of the victims of Pan Am flight 103 bombing in the garden of remembrance at Dryfesdale Cemetery, near Lockerbie, Scotland, Saturday, Dec. 21, 2013. Pan Am flight 103 was blown apart above the Scottish border town of Lockerbie on Dec. 21, 1988. All 269 passengers and crew on the flight and 11 people on the ground were killed in the bombing. (AP Photo/Scott Heppell). (The Associated Press)

A member of the public looks at the main memorial stone in memory of the victims of Pan Am flight 103 bombing in the garden of remembrance at Dryfesdale Cemetery, near Lockerbie, Scotland, Saturday, Dec. 21, 2013. Pan Am flight 103 was blown apart above the Scottish border town of Lockerbie on Dec. 21, 1988. All 269 passengers and crew on the flight and 11 people on the ground were killed in the bombing. (AP Photo/Scott Heppell). (The Associated Press)

The shadow of a member of the public is seen looking at the main memorial stone in memory of the victims of Pan Am flight 103 bombing, in the garden of remembrance at Dryfesdale Cemetery, near Lockerbie, Scotland. Saturday Dec. 21, 2013. Pan Am flight 103 was blown apart above the Scottish border town of Lockerbie on Dec. 21, 1988. All 269 passengers and crew on the flight and 11 people on the ground were killed in the bombing. (AP Photo/Scott Heppell). (The Associated Press)

Senior British politicians and some of the families of those who died in the 1988 airliner bombing over Scotland will gather in London and Scotland for memorials marking the attack's 25th anniversary.

Scottish leader Alex Salmond will lead a wreath-laying ceremony at Dryfesdale Cemetery in the town of Lockerbie, where Pan Am 103 exploded soon after takeoff from London on the evening of Dec. 21, 1988. The terror attack, the deadliest to have taken place in Britain, killed 270.

Later Saturday, other senior Scottish officials will attend a service at London's Westminster Abbey.

In the United States, where most of the victims were from. U.S. Attorney General Eric Holder and other officials will speak at a ceremony at Virginia's Arlington National Cemetery.