Venezuelan authorities are filing suit in the U.S. against a website widely used in the South American country to track the plummeting black market value of the local currency.

In an unusual complaint filled with images, high-flown language and even links to journalists' personal websites, the Venezuelan Central Bank alleges that the Venezuelan immigrants in the U.S. behind the site DolarToday are committing cyberterrorism and sowing economic chaos.

DolarToday's backers could not immediately be reached for comment.

Venezuela restricts access to dollars using a multi-tiered exchange rate system. But many people use a parallel market, where the value of the local currency has been plummeting.

DolarToday has become a ubiquitous tool to check the value of this parallel market.