1. Police Minister Avigdor Kahalani said the explosives were pipe bombs packed with nails.

2. They left behind pipe bombs as their calling cards, although no one was ever injured.

3. Black powder was used in the pipe bomb that caused the explosion, Daschle said.

4. The pipe bombs, on early evidence, appeared to be fairly crude.

5. A pipe bomb hidden in a black backpack explodes in a park filled with people, injuring scores with shards of shrapnel.

6. LETHAL pipe bomb device, discovered under a woman's car in crumlin, may be connected to an on-going feud in the area.

7. The man suspected of leaving a pipe bomb at a Colorado shopping mall is now in the custody of the FBI.

8. Firefighters found 2 propane tanks and a pipe bomb at a shopping mall in Denver, Corolado after a small fire broke out Wednesday, US media reported. Nearly 10,000 people were evacuated.

9. Dr. Cal Lightman: The ATF found a pipe bomb in a church basement in Lorton an hour later.

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10. In San Diego, all three devices, which shared some similarities, were pipe bombs delivered by mail.

11. The park has been closed since early Saturday, when the pipe bomb exploded during a free concert.

12. Police were also seeking a motive for an attempted pipe bomb attack on a house in Ballymoney, Co Antrim.

13. Just ten days after the crash, we had an undisputed terrorist incident when a pipe bomb exploded at the Olympics in Atlanta, killing two people.