Using the Boston Marathon bombing as justification, all venues are now required to subject fans to hand-held metal detection sweeps or walk-through magnetometers, a result of the Department of Homeland Security’s encroaching relationship with professional sports leagues.

“This procedure, which results from MLB’s continuing work with the Department of Homeland Security to standardize security practices across the game, will be in addition to bag checks that are now uniform throughout MLB,” baseball spokesman Michael Teevan told the Associated Press.