Nothing was found, which only means that the bomb hasn't been placed yet.

The authorities said a bomb had been placed either under or inside their car.

Some students worried about where else a bomb might be placed.

They were killed in Washington when a bomb placed under her car exploded.

It was a bomb placed in the then world of social discrimination.

The bomb was placed in a locker near a waiting room.

The bomb had been placed in her car under the hood the night before.

Some of the boys got off and placed bombs on the trucks.

You gave the order to have the bomb placed on board.

Police said that a bomb was placed on a bicycle.