1.   Emergency services were put on standby after A mystery caller claiming to be from the IRA telephoned a warning...

2.   His wife reported she last saw him when he left their house Friday night to meet a mystery caller.

3.   Firemen rushed to the village of Saint Pantaleon and broke down the door of an apartment -- where they found their mystery caller, mewing next to the telephone.

4.   A mystery caller to the rebel Chechen news agency claimed Sunday that two bomb attacks on trolley buses in Moscow last week were the work of Chechen separatists.