9 gigabytes of information was posted by the user called Emleaks on Pastebin website, which allows anonymous data sharing.
It is currently unknown who is responsible for the leak.
Macron's political movement En Marche! announced that it became the target of mass and coordinated hacker attack leading to the diffusion on social media of various internal information, the message says.
Macron’s headquarters claim that the hack may have been organized by the people, interested in discrediting position of centrist candidate at the election. However, published documents are not a great concern in the HQ — they claim fake documents were published along with authentic ones on the file-sharing website.
MORE: Macron campaign says leak authors wanted to undermine campaign before second-round vote, but documents have no reason to concern them https://t.co/eCzyNRw9gu— Reuters World (@ReutersWorld) 5 мая 2017 г.
At the same time, WikiLeaks team also said on Twitter that they have not found fakes in Macron leaks yet: "We are very skeptical that the Macron campaign is faster than us".
As it was reported earlier, polls showed that Macron would get 62 percent of the votes in the runoff while Le Pen could count on 38, and it means that it is Macron’s best in the voting survey by now.