Just in case you ever need to politely respond to one of these...
1. On receipt of a telephoned bomb threat:
(a) Try to be calm and courteous.
(b) If at all possible keep the caller talking, for example, by pretending difficulty in hearing, and repeat all the information you receive alound
2. Try to find out:
(a) Exactly where is the bomb?
(b) When will it go off?
(c) What does it look like?
(d) What organization do they represent or why are they making the threat?
(e) How does the bomb work?
(f) Where is the caller phoning from?