Supporters of former International Monetary Fund chief Dominique Strauss-Kahn appealed on Sunday to French authorities to investigate new allegations that President Nicolas Sarkozy’s political party may have improperly accessed his personal e-mail.

The online appeal from the support group Club DSK follows a report published Saturday in the New York Review of Books that has led to new speculation about a possible conspiracy aimed at damaging Strauss-Kahn.

That report, citing unidentified sources close to Strauss-Kahn, alleged that at least one private e-mail sent from his cellphone had been read at Sarkozy’s UMP party offices. UMP officials have denied claims of a plot.

Strauss-Kahn, a Socialist, was considered Sarkozy’s top rival in France’s 2012 presidential race until his career came crashing down over revelations about a sexual encounter he had with a New York hotel maid on May 14.

The newspaper report, citing several unidentified people close to Strauss-Kahn, said an unidentified friend of his who had been working temporarily in the Paris offices of Sarkozy’s conservative party had warned Strauss-Kahn that day that at least one private e-mail he had sent to his wife from his cellphone had been read at the UMP party offices.

Interior Minister Claude Gueant, one of Sarkozy’s top confidants, told Europe-1 radio on Sunday that the allegations of a plot were “fantasy” and that “if anyone thinks there was a plot, they simply have to file suit.”

Club DSK President Antonio Duarte, who said the group has 10,000 members, told the Associated Press that his organization is considering that possibility but that no decision had been made.

For now, Club DSK appealed in a statement posted on its Web site for state prosecutors to examine the allegations and for a parliamentary panel to be created to look into them.

A spokeswoman for Strauss-Kahn did not immediately return calls from the AP seeking comment.