11.   Investigators and a sniffing dog spent Thursday examining the twisted, blackened wreckage of the trailer.

12.   Police sealed off the area, and bomb experts and sniffing dogs were rushed to the scene, news reports said.

13.   Police with bomb sniffing dogs were patrolling department stores, among other measures.

14.   Rescue workers in bright yellow and orange suits sifted through the smoldering ruins with sniffing dogs in search of survivors and dead bodies.

15.   Several police officers with a sniffing dog arrived at the Laromme hotel, scouring the lobby, atrium area and upper floors for explosives.

16.   Some police questioned the men as others with a bomb sniffing dog examined their dark station wagon.

17.   Sniffing dogs brought by German rescue workers located them, alerting workers who followed their shouts for help, Wagih said.

18.   Sniffing dogs first detected her, alerting workers who finally heard her screams.

19.   Sniffing dogs located her and workers then heard her screams, Wagih said.

20.   Sniffing dogs located her, alerting workers who followed her screams, Wagih said.