The online sites were inaccessible for many users in Turkey, with the Hurriyet newspaper saying that service providers received an order from prosecutors to block those three internet giants as well as other websites.
The authorities set a deadline of four hours for Twitter, Facebook and YouTube to remove the offending content.
Facebook was initially the only one to comply with the deadline and access to the social network was restored accordingly, Tayfur Acarer, head of country's telecommunications authority (TIB), told Hurriyet.
However a Twitter source, who did not confirm that the social media platform had complied with Turkey's demand, said the company planned to appeal the Turkish court order.
More From This Section
Discussions with YouTube were ongoing, Hurriyet quoted Kentles as saying.
YouTube.Com ran the text of a court ruling on its site saying an "administration measure" had been implemented by TIB.
Hurriyet said the order blocked a total of 166 websites which published the images, including Facebook, Twitter and YouTube.
The ban was widely circumvented as well as mocked by many of Turkey's almost 12 million Twitter users, with one user named @BinaShah writing: "Come to Turkey and disconnect (possible new tourism slogan)."
The hashtag #TwitterisblockedinTurkey quickly made it to Twitter's top world trending topics.
Prosecutor Mehmet Selim Kiraz and his two captors linked to the Marxist Revolutionary People's Liberation Party-Front (DHKP-C) were killed after a shootout at a courthouse in Istanbul last Tuesday.