Christian and Jewish religious targets were also planned to be attacked.
According to the Turkish news channel TRT Haber, they should have received their orders from the terrorist sect IS.
The plans were revealed by the Turkish police's anti-terrorist unit and the arrests were made on Saturday, writes TT.
"The Ministry of Foreign Affairs has taken note of the information and is in contact with our embassies in Turkey.
We are following up on the information," writes Sofie Westling from the Ministry of Foreign Affairs' press service in an email to SVT.
The text is updated