1.   Bien Hoa was relatively safe, though sirens occasionally warned of mortar attacks.

2.   A siren would warn residents to clear the area in the event of increased volcanic activity.

3.   A siren would warn residents to clear the area in the event of increased volcanic activity, the government said in a statement.

4.   All the homes are located in the evacuated southern half of the island and the sirens warned anyone lingering in the no-travel zone to leave immediately.

5.   Sirens had earlier warned of possible Serb attack, but nobody took it very seriously.

6.   Sirens warned citizens to take cover.

7.   Trudging through mud, the chief of the International Red Cross on Sunday toured sites of recent airstrikes while air raid sirens warned of possible new NATO raids.