WikiLeaks founder Julian Assange has said the organisation is planning to publish around one million documents related to three governments and the US election before the end of the year.
Speaking via video link at an event in Berlin to celebrate Wikileaks' 10th anniversary, Assange said the release would affect three "powerful organisations in three different states".
Assange denied that the release of the documents was specifically designed to damage Democratic presidential candidate Hillary Clinton.
The WikiLeaks editor-in-chief, whose appeal against a European warrant for his arrest was recently rejected, also revealed plans about changes to the way the group is organised and funded.
Assange said WikiLeaks would soon open itself to membership, and was seeking to expand its work beyond the 100 media organisations it already works with.
The announcement of the release of documents was due to made on the balcony of the Ecuadorian embassy in London on Monday, but was cancelled due to security concerns.
Assange has been confined to the Ecuadoran embassy since 2012 to avoid extradition to Sweden, where he is wanted by prosecutors in relation to sexual assault allegations.