I’ve heard about a couple of “raids” of auto parts suppliers from people who worked there. Despite the fact that the press always states how such-and-such three letter agency “raided” the offices of a company, what really goes on is some number of agents walk in the door, go to the reception desk with warrant/documents in hand, and say “we are here to speak with these individuals. Please get them and send everyone else home.”
there’s no rappelling down the outside walls yelling “Hut! Hut! Hut! Hut!”