Turkish police forces on Sunday found some weapons, including several assault rifles, at least one grenade launcher and petrol bombs, at the Haci Semsettin Yusma mosque in Nusabayin, a Turkish town on the Syrian border in Mardin province.
Turkish security sources who spoke on condition of anonymity, said the stash was hidden by supporters of the outlawed PKK and discovered when police conducted searches following an explosion that injured two police officers on Friday.
Documents related to the outlawed PKK were also found in the police raid together with the weapons.
The PKK’s renewed armed campaign against the Turkish state has resulted in 44 Turkish security officers' deaths since the Suruc bombing of July 20 that had killed 34 people.
PKK is an armed militant group - which was listed as a terrorist organisation by Turkey, the EU and US- has been carrying out terror attacks mostly in southeast Turkey since the early 1980s.
The group was founded by Abdullah Ocalan who was captured in Kenya and has been imprisoned by the Turkish government since 1999.
The group has claimed more than 40,000 lives during 30 years of armed conflict with the Turkish government.
In early 2013, Turkey launched a ‘Peace Process’ to end the years of armed conflict wıth PKK and to build reforms regarding the constitution.
However, PKK broke the ceasefire last month when the militants restarted to attack on Turkish security targets as well as civilian facilities like the construction of dams and airports.