While the U.S. and other NATO allies continue to support PKK's Syrian wing PYD and its affiliated groups on the pretext of battling Daish, despite Turkey's objections, new evidence proving ties between the armed terrorist groups continue to emerge, adding to existing signs of cooperation.

Turkish security forces found YPG identity cars on Tuesday during their operations against the PKK terrorist group conducted in Çukurca district of southwestern Hakkari province.

Seven terrorists were killed in clashes that took place southwest of Güven Mountain, bringing the total number of terrorists killed in Hakkari to 400.

While scanning the field after the clashes, YPG identity cards were found among the documents, equipment and ammunition left behind by the terrorists.

Earlier on Monday, aid sacks bearing the logo of the Office of the United Nations High Commissioner for Refugees (UNHCR) were also found among the items, raising questions about the extent of international support being provided to the terrorist group.

Turkey's southeastern most province Hakkari is a mountainous area bordering Iraq and Iran, where PKK terrorists are active and a large number of PKK terror attacks have been reported since the group resumed its armed campaign in July last year.

Renewed violence in Turkey has come in the wake of the July 20 Suruç bombing that was allegedly carried out by Daish and left dozens of people dead. The subsequent PKK-linked murder of two Turkish police officers in their homes sparked a new wave of conflict in the country.

Since then, PKK terrorist attacks have killed more than 600 security personnel and also claimed the lives of numerous civilians, including women and children, while more than 7,000 PKK terrorists have been killed in army operations.

The Turkish government has intensified its counterterror operations following the recent attacks carried out by the PKK, which is recognized as a terrorist organization by the U.S., the EU and Turkey.

Formed in 1978, the terrorist group waged a war against the Turkish government for an independent state until the early 2000s and then shifted its goal to autonomy in the predominantly Kurdish regions of Turkey.