1.   A shock wave and a bright flash preceded the blast.

2.   The blast was preceded by an anonymous warning call from someone who sounded like a white American male.

3.   The blast was preceded by two days of riots in the West Bank.

4.   The blasts there were preceded by a telephone warning but authorities provided no details.

5.   A volley of gunfire preceded the blast, according to one of those injured in the explosion.

6.   Witnesses said they heard four powerful blasts preceded by a fire shortly after noon.

7.   Police said fire from dust-collecting equipment preceded the blast.

8.   That blast was preceded by a warning from the IRA and police managed to clear most people from the area before the device exploded.