Controversial preacher Zakir Naik was interrogated for about seven hours at Bukit Aman on Friday, over his alleged racially charged comments.br br Bukit Aman is investigating Zakir under Section 504 of the Penal Code for intentional insult with intent to provoke a breach of the peace after getting 115 public complaints over his latest remarks during a lecture in Kota Baru, Kelantan last week.