BEIRUT The Turkish army shelled positions held by Kurdish-backed militia in northern Syria for a second day on Sunday, killing two fighters, the Syrian Observatory for Human Rights monitoring group said.
Turkey on Saturday demanded the powerful Syrian Kurdish YPG militia withdraw from areas that it had captured in the northern Aleppo region in recent days from insurgents in Syria, including the Menagh air base. The shelling has targeted those areas.
Turkey has been alarmed by the expansion of Kurdish sway in northern Syria since the start of the conflict in 2011. The YPG controls nearly all of Syria's northern frontier with Turkey, and has been a close ally of the United States in the campaign against Islamic State in Syria.
But Ankara views the group as an extension of the Kurdistan Workers Party (PKK), which has waged a three-decade-old insurgency for autonomy in southeast Turkey.
Prime Minister Ahmet Davutoglu said on Saturday the shelling had taken place under "the rules of engagement against forces that represented a threat in Azaz and the surrounding area".
He demanded that the Menagh base be evacuated and said he had spoken to U.S. Vice President Joe Biden to make that point and stress that the PYD was an extension of the PKK and a direct threat to Turkey.
The shelling intensified at 2 a.m. (0000 GMT) before dying down but not stopping, said the Observatory, which reports on the war using a network of sources on the ground.
The Kurdish-backed Syria Democratic Forces alliance was also fighting Syrian insurgents near the town of Tel Rifaat, the Observatory said.
Syria's military, backed by Russian air strikes, is fighting Syrian insurgents in the same area, trying to seal the frontier with Turkey and reclaim areas of Aleppo city held by rebels.
The YPG denies that it is working with President Bashar al-Assad, whose forces have been fighting rebels seeking to topple him for five years.
(Writing by Tom Perry; Editing by Louise Ireland)
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Updated Date: Feb 14, 2016 15:00 PM