The FBI is looking into the $300 million dollar deal Whitefish Energy, a small Montana firm, struck with Puerto Rico's power authority to rebuild the island's power grid, the Wall Street Journal reports.

• The big picture: Puerto Rico's Gov. Ricardo Rossello called for the deal to be canceled Sunday because it became a distraction after members of Congress and FEMA raised concerns. The power authority later announced it would cancel the deal.
• Go deeper: A breakdown of the contract