No details were immediately available on the latest arrest warrants which came after a court on Monday jailed the opposition newspaper Cumhuriyet's online editor.
The Turkish parliament signed off on the accord two weeks ago.
Harold Rhode: In the Middle East, truth is a malleable commodity and regimes invent whatever evidence they need.
Did the Turkish leader stage a coup to legitimize the assault on his enemies?
This development is worrisome for many reasons, and Israel should think twice before getting in bed with the likes of Erdogan.
Cihan news agency said on its website late on Monday an Istanbul court would appoint an administrator to run the agency, in another step by Erdogan to limit criticism.
Turkish President Recep Tayyip Erdogan and a family member were allegedly involved in the complex graft operation.
Erdogan answers critiques of his allegedly lavish lifestyle.
Turkey's democratic credentials have suffered as Erdogan's has tightened his grip. Charges have been filed against those who have insulted him, and social media has periodically been blocked.
"The Turkish government still refrains from taking a clear position on the Islamic State," says opposition official.