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GAINESVILLE, Fla. (AP) -- The Gainesville Sun reports that UF police filed a complaint Friday that seeks misdemeanor hazing chargesagainst 10 members of the Alpha Phi Alphafraternity.

University of Florida police are investigating hazing at a fraternity in which members repeatedly struck and paddled pledges as part of an initiation ritual.

No one at the fraternity would comment.

Police say the five victims were struck hard on the chest with what are called "thunderslaps" if they didn't answer certain questions correctly. They were also paddled repeatedly. Police photos showed evidence of bruises and red marks. One victim said he couldn't sleep on his back for several nights.

Nine of the suspects are UF students and one is an alumnus. A university spokesman says students are typically issued interim suspensions in such cases.