Bottles were thrown at policemen, and then an unidentified explosive device went off.

We didn't find anything that outwardly appeared to be dangerous or appeared to be an explosive device.

This is just a chemical reaction, not an improvised explosive device.

Bob and Doug were up in the hatch. That's when the vehicle hit an improvised explosive device.

If the bag had, in fact, contained the explosive device that was anticipated, the bomb could have detonated several times over in the hour that the bag sat there.

This was a concealed explosive device that was left on piles of LPG tanks. This was purely to sow terror.