WikiLeaks has more than a million documents to study and will release a series of publications in the coming weeks, its founder Julian Assange has revealed.

Speaking on the 10th anniversary of the whistle blowing organisation, Mr Assange said some of the information relates to next month's US presidential election.

He spoke via a video link to a press conference in Berlin, signalling that WikiLeaks will be stepping up its investigative work.

The Australian has been living in the Ecuadorean Embassy in London for the past four years to avoid extradition to Sweden - where he is wanted for questioning over a sex allegation which he has always denied.

Wearing a black t-shirt bearing the word Truth, he said WikiLeaks had released an average of 3,000 documents a day over the past decade.

The 45-year-old had been due to make a statement from the balcony of the Ecuadorian embassy, but it was changed to a video link due to "recent security concerns."

A man scaled a wall at the embassy in the early hours in August. The intruder was spotted at the side of the building, which includes a window, and fled after being caught by the embassy's security staff.

The embassy complained it was two hours before anyone from the British authorities arrived.

Asked during the two-hour press conference how his health was after spending four years inside the embassy, Mr Assange replied that he was "a bit pale."

He said: "I was thinking, it would be pretty interesting for Vitamin D research. It's pretty rare to have a subject who has not seen the sun for four years but is otherwise healthy."

[Read more: 6 of WikiLeaks' biggest stories as the whistleblowing website turns 10]

WikiLeaks has published 10 million documents over the past decade, including top-secret US State Department cables, saying they revealed "covert operations and cover-ups".

Mr Assange said the information would have been "stored away" if it had not been for WikiLeaks.

"We have a great many upcoming publications. We have more than one million documents to go through."

He said WikiLeaks was engaged in a new project to recruit people across the world and would be releasing "many publications" before the end of the year.

These will include significant material affecting three "large organisations" in three different US states.

Material will be published every week for the next 10 weeks, with those relating to the US election being available before November 8.

He said WikiLeaks needed to recruit an "army" of people to defend it from the pressure it was facing.

Sarah Harrison of WikiLeaks told the press conference that the organisation had faced propaganda attacks and technical attempts to "take it down" which had all been rebuffed.

"We will keep publishing, " she said.