1. Never lie or provide false information to the FBI. Lying to an FBI agent is a crime.
2. You have no obligation to talk to the FBI, even if you are not a citizen. Refusing to answer questions cannot be held against you. It does not imply that you have something to hide.
3. You do not have to permit them to enter your home. FBI agents must possess a search warrant in order to enter your home. If they say they have a warrant, demand to see it before allowing them to enter. Even if they have a warrant, you are under no obligation to answer questions. ALWAYS have an attorney present when answering questions.
4. Contact CAIR and an attorney for advice.
Source: Creeping Sharia