How does the FBI seize websites if they cannot use the law?

After doing some research about websites that have been taken down like Silk Road I have been extremely curious about the procedure that the FBI does to take down a website from the Internet.

How do they do it if the website is hosted in another country for example? Do they just contact the hosting company and blackmail them? Does the FBI “hack” the websites they cannot seize?

My question applies for both Dark Web and Clear Web websites. I understand that is much easier for a government entity to just use the law for their purposes but that’s not always possible…

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