Prosecutors had accused the suspects of “incitement to hatred and enmity,” the official Anadolu news agency reported.
While five other suspects were being sought, the 11 were detained and then released later Thursday.
The 11 included actor Cem Yigit Uzumoglu, who played Ottoman Sultan Mehmed II in a popular series “Rise of Empires: Ottoman”.
“We are free to protest, express our opinions and we will continue to be,” Uzumoglu, 31, told reporters after his release.
“And if there is an obstacle, we will continue to fight,” he added.
The leader of the main opposition Republican People’s Party (CHP) called on for a spending boycott Wednesday to pressure the government after the March 19 arrest of Istanbul’s mayor Ekrem Imamoglu.
Imamoglu is the main rival to President Recep Tayyip Erdogan. His detention set off mass protests.
Nearly 2,000 people, including several hundred students and young people, have been arrested since the protests started.
Some cafes, restaurants and bars in Istanbul and Ankara remained closed on Wednesday following the boycott call.
CHP leader Ozgur Ozel has also called for a boycott of dozens of Turkish companies and groups considered close to Erdogan’s government.
‘Boycott form of protest’
Erdogan has backed the companies, highlighting their value to the country’s economy.
Ministers denounced the boycott calls, with trade minister Omer Bolat sharing pictures on social media of himself shopping in a store “in a show of solidarity against the calls by some opposition groups in order to harm our country”.
Other supporters of the boycott have faced reprisals.
Turkey’s state-run broadcaster TRT dismissed actress Aybuke Pusat from the television series “Teskilat” (“The Organisation”) after she gave open support for the opposition-led campaign.
“It’s never acceptable for the people involved in TRT projects… to be part of a political campaign that is clearly initiated by a political party, that targets our country’s economy and seeks to design politics and polarise the nation,” the broadcaster’s director-general Mehmet Zahid Sobaci said on Wednesday.
’Solidarity’
The boycott calls spread this week when British rock band Muse said on Wednesday they had cancelled a concert in Istanbul, after a backlash from fans at the concert promoter who criticised anti-government protests.
The campaign has also targeted Turkish media outlets known to be close to the government and that failed to broadcast the massive protests against Imamoglu’s jailing.
Turkish television watchdog RTUK’s president Ebubekir Sahin warned media outlets backing the boycott calls and said they were being monitored.
The European Union, which Turkey has said it wants to join, has described the arrest and protests as “worrying”.
Its enlargement commissioner, Marta Kos, on Tuesday cancelled a visit to Turkey for a diplomatic forum and a planned meeting with the Turkish foreign minister “because of what is happening” in the country.
Turkey’s diplomatic mission to the EU said on the social media platform X that it viewed that cancellation “to be a politically motivated measure” that went against the “impartial” position the European Commission was meant to take.