March has taken place each year since Ocalan was detained in 1999
Thousands of Kurds marched through the French city of Strasbourg on Saturday to call for the release of jailed PKK founder Abdullah Ocalan and protest against Turkey's military offensive in Syria.
"UN, take your responsibility and stop the genocide in Afrin," read one banner, referring to the region in northern Syria where Turkey is waging a campaign against a Syrian Kurd militia.
The protesters who came from across Europe also waved Kurdish flags and pictures of the leader of the outlawed Kurdistan Workers' Party (PKK), chanting "Freedom for Ocalan".
There was a strong police presence at the demonstration, which police said attracted 11,000 people, while organisers put the number at 25,000-30,000.
— Arab News (@Arab_News) February 17, 2018
The march has taken place each year in the city that hosts the European Court of Human Rights and the Council of Europe since Ocalan was detained in 1999.
Ocalan, the figurehead of the PKK's bloody insurgency against the Turkish state, remains behind bars on a prison island off Istanbul.
Ankara launched an offensive in the Afrin area of northern Syria last month against the Syrian Kurdish People's Protection Units (YPG), which it considers a terror group but is allied with US forces in the fight against the Islamic State (IS) group.
Presidential spokesman Ibrahim Kalin on Saturday called on Washington to begin to disengage from the YPG, Anadolu news agency said.
In a column for a Turkish newspaper he wrote: "The US should start the process of disengaging from the YPG and move it out of Manbij and to east of Euphrates."
A protester in France, Newroz, said: "[Turkish President Recep Tayyip] Erdogan is becoming very aggressive towards the Kurds and the situation is getting a lot worse, year after year, month after month." Newroz said he came from Germany to attend the rally with his sister and friends.
"Erdogan is a 100 percent dictator, every European should know this," added Okce, who also came from Germany.