1.   - Unusual odors.

2.   After the star had been in his car a few minutes he detected an unusual odor.

3.   But neighbors never reported any unusual odors, before or after the discovery last week.

4.   Officers found the front door locked, but decided to force entry after smelling an unusual odor.

5.   You noticed unusual odors such as the smell of gas or sulfur.

6.   A dozen fire trucks raced to a major train station in western Japan Wednesday evening after passengers reported an unusual odor, but authorities found nothing.