The U.S. Food and Drug Administration is currently investigating a report that five deaths are linked to the popular Monster Energy drink, according to the Associated Press.

AP says the FDA is investigating reports that date back to 2004 that say the drink had “adverse affects” on people which may have related to their death. At this time, the lawsuit and all accusations are merely allegations, but the FDA will continue to look into the matter.

The report emerged following a request by the mother of a 14-year-old Maryland girl who died in December from heart problems after drinking Monster Energy on two consecutive days, said the She claimed that the drink company failed to warn consumers about the adverse effects the highly caffeinated drink can have on people.

The Maryland girl, Anais Fournier, drank two Monster Energy beverages that contained a combined 480 milligrams of caffeine, equivalent to 14 12-oz. cans of Coca-Cola, according to the lawsuit filed by Wendy Crossland and Richard Fournier in California Superior Court on Oct. 17.

Monster fell 14 percent to $45.73 at the close of New York trading.