A car bomb killed at least 13 people in a Turkish-held border town in northeast Syria Saturday, as thousands of Kurds in the wider region protested against "Turkish occupation".
The bombing ripped through Tal Abyad, one of several once Kurdish-controlled towns seized by Turkey last month in a deadly cross-border offensive.
The blast came despite a truce last week to halt the Turkish assault that began on 9 October and sparked the latest humanitarian disaster of Syria's eight-year war.
On Saturday, an AFP correspondent in Tal Abyad saw the skeletons of two motorbikes ablaze in the middle of a rubble-strewn street.
A group of men carried the severely burnt body of a victim onto the back of a pickup truck, as a veiled young woman stood aghast by the side of the street.
Turkey's defence ministry said 13 civilians were killed in the attack, which it blamed on Kurdish fighters.
The Syrian Observatory for Human Rights, a Britain-based war monitor, reported 14 people - pro-Ankara fighters and civilians - had been killed in the explosion.
Meanwhile, in the Kurdish-majority city of Qamishli, thousands of Syrian Kurds marched in the streets to protest what they view as a Turkish invasion.
"No to Turkish occupation," they cried, brandishing flags of their once semi-autonomous region and its fighters.
In the German capital, the police said around 1,000 people protested to "stop the war" against the Kurds, while hundreds in Paris called for sanctions against Turkey.
US troops return?
The truce deal signed last week between Ankara and Moscow demands Kurdish fighters withdraw from the border.
It hands a 120-kilometre-long stretch of borderland including Tal Abyad over to Turkey and provides for joint Russian-Turkish patrols along other parts of the frontier - the first of which started on Friday.
Ankara views Syrian Kurdish fighters as "terrorists", and wants to expel them from areas along its southern border.
But Turkey also hopes to resettle there some of the 3.6 million Syrian refugees it hosts on its own soil.
UN Secretary-General Antonio Guterres told Turkey's President Recep Tayyip Erdogan the United Nations would study Ankara's plans for repatriation.
The Turkish attack last month came after US President Donald Trump said he had ordered US troops to leave northern Syria.
But on Saturday, US troops visited Kurdish forces in Qamishli in the second such spotting of American forces in northeastern Syria since that announcement.
Beige-coloured armoured vehicles flying the American flag pulled up at the headquarters of the Kurdish-led Syrian Democratic Forces, the de-facto army of Syria's Kurds.
The SDF has been a key US ally in fighting the IS jihadist group, backed by airstrikes by a US-led coalition.
A source who attended a meeting with the Americans on Saturday said they wanted to return to set up a military post in Qamishli.
The coalition declined to comment specifically on Saturday's visit but said the alliance continued to withdraw forces from northern Syria, redeploying some troops to the oil-rich east of the country.
