CLEVELAND, Alabama - A 21-year-old Blount County man is in jail after posting on Facebook, "I am so irritated I could shoot up an elementary school," authorities said.

Blount County sheriff's deputies and Oneonta police arrested Dakota Kent at his Cleveland home this afternoon, Blount County District Attorney Pamela Casey confirmed. He is charged with making a terrorist threat, and is being held without bond in the Blount County Jail. Casey said she asked that bond be denied until Kent undergoes a mental evaluation.

Kent, who goes by Koty Kent on Facebook, wrote the post early today. Almost immediately, several people responded to his post, two of them saying, "It's too soon." To that, Kent replied, "Yeah, they won't even be in class for another 12 hours."

But Kent didn't stop there. "Jesus Christ,'' he wrote, "I can't be the only one who thought that was (expletive) hilarious. " Only one commenter took Kent to task for his comments, suggesting he needed to pray.

Kent wasn't having any of that. "God isn't real,'' he wrote. "And if you want to help the families get through this, send them a (expletive) "I'm sorry your kid got shot card." Kent and others commented on the status over a five-hour period. He also wrote, "He used over 100 rounds and only killed 26. They should just be lucky he was a bad shot." And this, "God knows no one would have made it out if it was me."

The district attorney said someone alerted authorities about the Facebook post today. Investigators sprang into action, she said. "It was the best teamwork I've seen,'' Casey said. "We were all working it at the same time."

Lawmen went to Kent's home in Cleveland about 2 p.m. He was arrested without incident. Casey said investigators did a great job preserving the Facebook evidence, and sweeping and securing the home.

She said she doesn't know what Kent's intentions were, and it doesn't matter. "With everything that has happened in Newtown, you don't kid around about stuff like that, especially when you carry it as far as he did,'' she said. "We as law enforcement have to take it seriously."