1.   Mysterious pungent fumes caused panic at the school, but the nature and source of the fumes were not immediately clear.

2.   Twelve people were treated at hospitals Thursday after inhaling mysterious noxious fumes at a fitness club south of Tokyo, police said.

3.   Four men were hit by mysterious fumes Wednesday morning in a train station toilet in Tokyo and were taken to hospital, Jiji Press said.

4.   A warrant was issued Monday for Asahara in connection with the attack on the Tokyo subway, while mysterious fumes hit railways in Yokohama again Monday evening.

5.   A warrant was issued Monday for Asahara in connection with the nerve gas attack on the Tokyo subway, while mysterious fumes hit railways in Yokohama again.

6.   Two officers were overcome by mysterious fumes that erupted from an ammunition container as they were searching the locker.

7.   Police launched an unprecedented search for Aum fugitives in May last year following a series of mysterious fume incidents across the nation from last year.