Forty minutes later, at about 8.40pm, the device went off.

A 20-minute warning had been given, but the device went off after just 10 minutes.

It looks like an automatic device is going to pick us up.

The device was certainly going back together in a hurry.

But we don't see any evidence that the devices are going to be effective in the hands of the public.

At 00:50, ten minutes before the time the caller had given, the device went off.

If anything, save for the fact that no other devices had gone off, the situation was worse.

The device went off between the lieutenant's vehicle and the one behind it.

It appeared practically the moment the main device went down.

"Three small devices went off and burned quickly," one police officer said.