"FBI. Attention!" Loop on my iPhone's Safari Page
I clicked on a link while on my iPhone that took me to a page where a message popped up accusing me of viewing banned ***********. On the top of the message, it says, "FBI. Attention!" They are trying to extort $500 from me. I can't get the messages to stop popping up, nor can I get Safari to take me away from this page. I'm certain this is a scam but don't know how to reset Safari. Can someone please help me? Thank you.
MacBook Pro, OS X Mavericks (10.9)