This just in from ABC News:

A Missouri man is accused of planning a movie theater massacre at a screening of the final "Twilight" movie. Blaec Lammers, 20, was charged Friday with first-degree assault, making a terroristic threat and armed criminal action after his mother alerted police that he had purchased 400 rounds of ammunition and two assault rifles "very similar to the ones in Aurora, Colo., movie theater shooting," according to probable cause statement issued by the Bolivar, Mo., Police Department.

Police characterized Lammers as "being off his medication," but he was able to purchase the rifles on Monday and Tuesday this week. He then practiced shooting them in Aldrich, Mo.

Lammers remains held on $500,000 bond. Full story here.