A protestor holds a sign, center, which reads ‘killer USA,’ and another holds a sign, right, which reads ‘killer Nato out’ during a demonstration ahead of the NATO Summit in Istanbul, Sunday. [AP]

Turkish authorities detained more than 100 people taking part in an anti-NATO protest march organized by the Communist Party of Turkey (TKP) on Sunday, ahead of an alliance summit in Ankara next week, the party said in a statement. Turkey will host leaders from the 32 allied countries, as well as officials from NATO’s partners, in Ankara for a summit on Tuesday and Wednesday. Authorities have ramped up security measures across ⁠the Turkish capital ahead of the meeting, banning ⁠demonstrations, barricading large parts of the city, and closing off roads.

In a statement, the TKP said it had organized the protest march in Ankara’s central Kizilay square, adding that ​more than 100 party members, including administrators, ⁠had been detained.

Footage showed flag-waving protesters chanting slogans including “Murderer NATO, get out of country” and “No passage to NATO,” as riot police intervened using tear gas ⁠to disperse crowds.

In a separate protest organized ‌by ⁠the TKP, hundreds of people marched from Istanbul’s Taksim Square to Dolmabahce. There were also two separate protests organized by leftist groups in the Kadikoy district. Despite a heavy police presence, there ​were no scuffles during the protests in Istanbul.