TMZ.com passed this along.

“WWE RAW” Arena — We Don’t Have a Mice Problem!

The arena that hosted WWE RAW last night wants to make it perfectly clear … they do NOT have a rodent infestation — they were just the innocent victim of a mouse prank.

Ernie Hahn — GM of Valley View Casino Center — tells TMZ, the mouse that made a cameo on last night’s show was a white “feeder” mouse bought from a store … NOT your average wild gray/brown variety.

Ernie claims the color theory proves it wasn’t an in-house mouse — and even if it were, it wouldn’t survive long … because according to Ernie, the arena employs a full-time pest service to keep critters under control.

As for who the vermin vigilante might be — the GM’s stumped.