The Telecommunications Communications Board, Turkey's Internet watchdog, said it had taken an "administrative measure" against the website – a term it commonly uses when blocking access to sites.
As many as 294,548 emails regarding Turkish president Recep Tayyip Erdogan’s AKP Party were published in response to the Ankara government’s widespread post-coup purges, despite an orchestrated cyberattack on the WikiLeaks website.
The most recent email in the trove released by the whistleblowing organisation on Tuesday was sent on July 6, 2016, a week before the coup, backdating to 2010.
It said in the release: "It should be noted that emails associated with the domain are mostly used for dealing with the world, as opposed to the most sensitive internal matters.
“WikiLeaks has moved forward its publication schedule in response to the government's post-coup purges.
“We have verified the material and the source, who is not connected, in any way, to the elements behind the attempted coup, or to a rival political party or state.”
Insisting it is neither pro- nor anti-government, WikiLeaks said its goal was to serve "the truth".
WikiLeaks said the release of 300,000 emails, with several thousand attached files, is just the first in the series and encompasses 762 mailboxes from "A" to "I".
One of the emails reportedly contains a database of the phone numbers of AKP deputies.
A few hours after the release, WikiLeaks tweeted a screenshot showing the database to be blocked in Turkey, claiming that Ankara "ordered [the release] to be blocked nationwide".
Appealing to the public for its support, it asked for people to share the documents widely.
It said on Monday: “We ask that Turks are ready with censorship bypassing systems such as TorBrowser and uTorrent. And that everyone else is ready to help them bypass censorship and push our links through the censorship to come."
The Anonymous hacktivist group released a statement of support for the latest Wikileaks exposure of AKP files, saying that it “suspect[ed]” the Turkish government to be behind the latest Wikileaks Ddos attacks.
“Opposition should always have a voice and the free flow of information should be encouraged. Wikileaks has sustained DDos attacks after announcing they will release e-mails (300,000), docs (500,000) of the Turkish government, and we suspect the Turkish government will try to censor any information Wikileaks will release.”
“We ask of the people in Turkey to take interest in the material Wikileaks is about to release and to not dismiss it because a leader tells them. We advocate the use of anti-censorship tools as Tor, I2P or VPN.
"We will do our best to translate those e-mails and documents for the international community to read and to provide a better understanding of the ongoing situation in Turkey."
At least 50,000 people have been rounded up, sacked or suspended from their jobs following last week's attempted coup.
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