11.   Shortly afterward, the city was plunged into darkness when electric power failed.

12.   The city was plunged into darkness as electricity went off during the raid, around nightfall.

13.   At night the city is plunged into darkness to save energy.

14.   The blast plunged the city, the capital of the Northwest Frontier province, into darkness and power remained disconnected Friday.

15.   The Lenin oil refinery in the northwest of the city was blazing, a witness said, and the city was plunged into darkness shortly after midnight.