1.   But no explosives residues were found on any of these items, Burmeister said.

2.   Her clothing was spattered with blood and what appeared to be explosives residue.

3.   In response, Hicks ordered an audit of the protocols used to identify explosives residue.

4.   Investigators have said that bomb-sniffing dogs alerted them to possible explosives residue at those locales.

5.   Security guards detected explosives residue on the shoes of a man who then disappeared into the crowd prompting an evacuation of the airport.

6.   Security guards detected explosives residue on the shoes of a man who then disappeared into the crowd prompting the evacuation.

7.   Activists say the admission bolsters claims by the Puerto Rican government that exercises contaminated the island with explosives residue and chemicals.

8.   Ludwig was later found in the area with explosives residue on his hands.

9.   Officials found explosives residue and bomb fragments after the blast, and said the explosion appeared to have been set off by a timer.