Lakeland, Florida – A senior at the Sonrise Christian School was arrested Friday after authorities began an investigation into his posting a countdown of the hours until he blew up the school on the popular “My Space” website, the Polk County Sheriff’s Office reported.

The arrest of Brian Russell Hall, 18, of 815 Wedgewood Lane, Lakeland, stemmed from word the school received from a visitor to his website about the threat. The school, in turn, contacted the Sheriff’s office.

Investigators went to the school and obtained his consent to search his person. They say they found a set of brass knuckles and a knife.

They say he also consented to a search of his vehicle, where deputies found two more knives and a pipe with marijuana residue in it.

Hall was booked into jail on charges of Possession of Weapon on School Property on his person; Possession of a Weapon on School Property in his car, Possession of Marijuana Less than 20 grams and Possession of Paraphernalia.

His computer was seized from his home, they said, and further charges related to the threat posted on the website are pending that investigation.

Deputies said he told them during an interview that the comments on the website were intended as a “senior prank.”