Turkish airstrikes and shelling have targeted 40 Daesh and six PKK and PYD terrorist positions in northern Syria, while 18 terrorists were killed in anti-terror operations in southeast Turkey, military sources said on Friday.

According to the sources, 18 PKK terrorists were killed in anti-terror operations conducted in rural parts of Turkey's southeastern Hakkari province on Thursday.

Meanwhile Turkey's army also said 40 Daesh and six PKK/PYD targets were hit as part of Operation Euphrates Shield in northern Syria.

Coalition airstrikes have also destroyed a vehicle belonging to Daesh terrorists in northern Syria, the sources added.

The PKK and its Syrian offshoot the PYD are both listed as terrorist groups by Turkey although the U.S. and EU only view the PKK as a terrorist organization.

Operation Euphrates Shield was launched in August to rid the north Syrian border area of terrorists. The campaign has seen both Daesh and the PKK/PYD targeted by the Free Syrian Army and Turkish tanks, artillery and aircraft.

The PKK resumed its decades-old armed campaign in July last year. Since then, PKK terrorist attacks martyred more than 700 security personnel and also claimed the lives of many civilians, including women and children, while nearly 8,000 PKK terrorists were killed in army operations.

Iraq has suffered a devastating security vacuum since mid-2014, when Daesh captured the northern city of Mosul, now the subject of a large offensive to retake it, and overran large swathes of territory in northern and western parts of the country.