At least 22 high school students were detained while they were protesting the government’s suspending of more than 4,500 teachers over terrorism charges in Diyarbakır, on Monday.

Some 30 students gathered on Diyarbakır’s Şeyh Sait Square holding banners that read: “Don’t touch my teacher,” or “We total not 12K but millions,” in clear reference to a recent government decision that suspended 11,285 teachers at once over their alleged ties to the outlawed Kurdistan Workers’ Party (PKK).

Of those suspended teachers, some 4,500 were serving in the eastern province of Diyarbakır.

Turkey has sacked nearly 30,000 teachers from civil service and suspended another 20,000 since the coup attempt, according to labor unions.