1.   Blue police lights pulsed through the cold night air, sirens wailed in the distance, radios crackled with word of murder and a manhunt.

2.   Out on the street, sirens wailed for two minutes, as people stopped in their tracks and observed a brief silence in memory of the dead.

3.   Air raid sirens wailed in several cities across Serbia late Tuesday, those in Belgrade sounded around nightfall and shortly before midnight.

4.   For the first time in three days on Thursday, Iraqis in Baghdad were not woken up by wailing air sirens signalling a US strike in the south.