U.S. troops serving in South Korea say a new policy forbidding members of the opposite sex into their dorm rooms is unfair and too harsh, a military news outlet reported Tuesday.

However, commanders at K-16 Air Base claimed the rule was in place to prevent sexual assaults, Stars and Stripes reported.

Lt. Col Tom Climber made the new rule after an alleged sexual assault occurred on the base outside of Seoul. Both military and civilian personnel are affected by the rule.

“Obviously, this brings morale down unbelievably,” a female Army private first class told Stars and Stripes. “It’s mass punishment for just a few that have been repeatedly in trouble.”

Soldiers living off base are not affected by the rule.

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