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CAMPBELLSVILLE, Ky. -- A charity stunt that has grown into a social media phenomenon went terribly wrong for four Kentucky firefighters who were injured when a fire truck's ladder got too close to a power line after they dumped water on college students who were taking part in an "ice bucket challenge."

Campbellsville Police Chief Tim Hazlette says the power line wasn't touched, but it carried such a high voltage that it was able to energize the ladder truck, shocking the firefighters.

He says the two in the bucket are at a hospital burn unit. One is in critical condition and the other is in fair condition. The other firefighters were treated and released.

The firefighters had just taken part in the challenge that helps raise money for ALS research. They dumped water on Campbellsville University's marching band.

Three Kentucky firefighters were injured when a fire truck's aerial ladder came in contact with a main power line while helping a university band do the ALS 'Ice Bucket Challenge.' VPC

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