1.   Michael Loudenslager was on the first floor on the north side of the federal building, where the bomb blast was centered, she said.

2.   It was edited in several places, and there was no definite indication of where the blast was centered.

3.   The blast was centered near an elevator vestibule.

4.   Vladimir Stavitsky, the deputy press chief for the security service, said the blast had been centered in a store on the first floor.