(NBC News) An Indiana teachers union is demanding change to active shooter drill protocols after teachers at an elementary school reported that they had been injured when they were shot by Airsoft guns during a recent exercise.

“During active shooter drill, four teachers at a time were taken into a room, told to crouch down and were shot execution style with some sort of projectiles — resulting in injuries to the extent that welts appeared, and blood was drawn,” a statement from the Indiana State Teachers Association on Wednesday said.

Association members said they were injured during the drill at Monticello’s Meadowlawn Elementary School, according to the statement.

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