Fighting between pro-Turkey factions in Syria's Aleppo countryside has escalated with assassinations and bombings being reported in regions under Ankara's control in the north.
Syrian sources said on Sunday that several people were wounded in a car bombing at the entrance of the al-Bab city in Aleppo's eastern countryside, amid a "war between opposition factions."
State news agency SANA reported other sources as saying that an explosive planted in a car went off at the entrance of the city.
The Syrian Observatory for Human Rights reported on the same bombing, saying it took place at a checkpoint of a pro-Turkey faction.
It confirmed injuries but did not provide further details.
Al-Bab in northeastern Aleppo has been held by pro-Ankara factions since 2016. Turkey had seized the area from the Kurdish People's Protection Units (YPG), which Ankara views as a terrorist group.
The Observatory also reported that unknown gunmen attempted to assassinate a leading member of the Jaysh al-Sharqiya unit of the pro-Turkey National Army.
He came under fire on the Afrin-al-Tranda road in northwestern Aleppo.