A pilot told me once that airliners have one or more locations where previously unknown to be on-board explosive devices suspected to be capable of going off in short notice shoud be placed, in case they are found during flight.
Yes, this is true. A "Least Risk Bomb Location" may be specified for an aircraft.
Is it so? Any examples for types currently flown? (So I can do a better job at picking my seat next trip)
Sorry, I don't think its appropriate to discuss this in any further depth.