The attack was directed at a building outside the town of Ayn Issa in the central border areas in the north, according to the Syrian Human Rights Observatory (SOHR), which follows the conflict development in Syria from the UK. The town is located in a part of Syria under Kurdish control.
All eleven fatalities were part of the same family, according to SOHR's information.
During the long war in Syria, Turkey has been a power player that has backed various rebel groups that have been involved in governing the Idlib province in the northwest. The rebel forces have been part of the large-scale offensive in recent weeks, which ended with the Syrian government chief Bashar al-Assad being overthrown and fleeing the country over the weekend.
In connection with the capture of the metropolis Aleppo, many Kurdish residents were reported to have fled east towards Kurdish-controlled areas.
Turkey has also regularly struck against the Kurdish forces that have established self-rule in the northeast, which in turn have long received support from the USA and other countries that Turkey is allied with within NATO.
Turkey has carried out up to 200 attacks against the Kurdish-controlled part of Syria, which borders Turkey in the north, this year. Tens of people have been killed in those attacks, according to SOHR's compilation.