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Bomb-sniffing dogs being used for a TOPOFF exercise in northeast Portland on Thursday detected the real thing.
In preparation for the TOPOFF exercise, bomb-sniffing dogs got a hit on several vehicles in the vicinity.
There is currently a heavy police presence in the area while police investigate.
....from your KATU link
They later discovered that the dogs had detected traces of explosives
in police and military vehicles that were involved in the exercise...