"If (Erdogan) is hindered from roaming around in Europe and influencing European countries the way he wants, then I hope that this will affect his politics", AFP quoted him as saying.
"They carry a card identifying them as journalists but they have no official press cards". Eser was detained earlier this month along with seven other rights activists and two foreign trainers.
Between 153 to 170 journalists are now in Turkish prisons, according to various global and local watchdogs.
Turkey also extended the detention of Amnesty International's local Director Idil Eser and nine others.
"Right after this failed coup they just brought this issue up once again, and by they, I mean the government", Professor Balaban told Sky News.
"A commission that is linked to a political office can not decide whether I am a journalist".
This week, Turkey is commemorating the coup anniversary in a series of events which will culminate late Saturday in parliament, where Erdogan is expected to speak at exactly the moment the building was attacked.
Erdogan said the charges stemmed from intelligence gathered by police.
Anti-terror police seized Avci at his Istanbul home and also seized another man identified as a fugitive sought for being a user of ByLock, an encrypted messaging app Ankara says was used by Gulen's followers, the agency added.
They were previously dismissed due to alleged links to the putsch.
At a meeting with media representatives, Prime Minister Binali Yıldırım announced on July 14 that the government will demand the extension of the emergency rule from the parliament on July 18 as the current one expires on July 19.
According to the Turkish government, the Fetullah Terrorist Organization (FETO) and its USA -based leader Fetullah Gulen orchestrated the defeated coup of July 15, 2016, which left 250 people martyred and almost 2,200 injured.