Time bomb
A time bomb is bomb whose detonation is triggered by the timer on it or a mechanism causing it to explode. When the timer reaches zero, the bomb will explode.
Time Bomb Media
Aftermath of the bombing at the Bologna railway station in August 1980 which killed 85 people, the deadliest event during the Years of Lead.
Aftermath of the Grand Hotel bombing in Brighton (1984) which was targeted at British Prime Minister Margaret Thatcher, the result of a time bomb which had been placed in the hotel nearly a month before it detonated. Thatcher wasn't harmed, five others were killed and 31 were injured.
Diagram of a simple time bomb in the form of a pipe bomb
