Turkish airstrikes hit several towns across northern Syria, including the city of Kobane late Saturday, Kurdish-led forces and a Britain-based monitoring group said.
The attacks come days after Ankara blamed the Kurdistan Workers’ Party (PKK) for a deadly bombing in central Istanbul last Sunday.
“Kobane, the city that defeated Isis, has been bombarded by Turkish occupation aircraft,” tweeted Farhad Shami, a spokesman for the Kurdish-led Syrian Democratic Forces (SDF).
Turkey views the Kurdish People’s Protection Units (YPG) – the main component of the SDF – as an extension of the outlawed PKK.
Shami said there were also airstrikes on two densely populated villages in northern Aleppo province and northeastern Hasakeh province.
The UK-based Syrian Observatory for Human Rights reported that the Turkish military had carried out more than 20 airstrikes in two provinces. The group has a wide network of contacts throughout Syria.
Kobane, a majority-Kurdish town in northern Syria near the Turkish border, was captured by the Islamic State group in late 2014, although Kurdish fighters drove them out early the following year.
Both the PKK and the YPG have denied any involvement in the attack in Istanbul, which killed six people.
But Turkey’s interior minister, Süleyman Soylu, said Ankara believed the attack was ordered from Kobane.