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Bombs detonated inside Memphis high school

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From Dave Alsup. Rick Martin and Melanie Whitley

(CNN) — A pair of makeshift bombs blew up Thursday inside a Memphis, Tennessee, high school, causing one person to be taken to a hospital, officials said.

The “pressurized” devices, which incorporated Drano clog remover, were placed in different hallways — one on the second floor, the other on the third floor — of Craigmont High School, said Memphis Fire Department Lt. Wayne Cook.

“What it appears is that we had a student or two do a prank,” said Staci Franklin, a spokeswoman for Memphis schools, describing each device as a “mailbox bomb.”

An assistant principal sought medical treatment after inhaling smoke from one of the bombs while evacuating students, according to Franklin. She added that he is believed to be OK.

Cook said the injured person was taken to Methodist North Hospital in Memphis for treatment.

Craigmont High School is situated on 50 acres in northeastern Memphis, a few miles from Interstate 40. The school has about 1,300 enrolled students, according to Cook.

In addition to firefighters, Memphis police and members of the federal Bureau of Alcohol, Tobacco, Firearms and Explosives were at the scene early Thursday afternoon, the fire department lieutenant said.