Republican Senator Rand Paul was stopped at an airport on Monday for setting off an alarm and refusing a patdown, prompting his father, U.S. presidential candidate Ron Paul, to accuse security officials of being part of an “out of control” police state.

In a harshly worded attack on the Transportation Security Administration, which handles security screenings at U.S. airports, Ron Paul, known for his strident libertarian views, said the TSA “gropes and grabs our kids and our seniors and does nothing to keep us safe.”