Above their heads another explosion boomed, and its echo thundered down the stairwell.

In Baghdad, explosions boomed near downtown in two attacks.

He took a moment to steady himself, no longer on horseback now but on foot, and then suddenly an explosion boomed not far behind him.

Another explosion boomed from beneath the archway of the main gate.

The militants were firing grenade launchers, he said, and explosions were booming.

Then, before men of crime could make another move, an explosion boomed from below.

Deep, dull explosions boomed through the structures about them kicking up a fury of dust and plaster.

The guests had all left off chattering, and crowded to the edge of the gallery as the next explosion from the river boomed in the distance.

Another explosion boomed and the building shook again, although not as drastically as it had before.

Another explosion boomed in the night at their backs.