Dozens of people have been detained in Turkey’s largest city, Istanbul, and police blocked key parts of the city as the LGBTQ+ community attempted to hold a Pride parade.

Police in Istanbul on Sunday blocked attempts to hold a banned LGBTQ+ Pride demonstration, detaining more than 50 people who tried to march, according to activists and an opposition politician.

Istanbul Pride has been banned annually by Turkish authorities since 2015, including this year.

The governor of Istanbul had earlier banned the LGBTQ+ community from holding a Pride Parade, saying it “undermines social peace, family structure, and moral values.”

A strong police presence in key areas of the city prevented large gatherings. Officers were seen clashing with activists holding rainbow flags in the city center.