Turkish police seized 74 kgs of C-4 explosives and 15 rocket launchers in an operation in the southeastern province of Sirnak, the semi-official Anatolia news agency reported on Tuesday.
The explosives and rocket launchers were believed to have been brought to Turkey from northern Iraq by members of the outlawed Kurdish Workers' Party (PKK), the local governor's office said in a statement.
Operations were underway in the regions, the statement added.
On the other hand, police in the Turkish Aegean province of Izmir arrested a suspected PKK member, who was preparing to stage bomb attacks in Turkey, and seized 2.5 kgs of C-4 explosives hidden in his house, Anatolia reported.
The PKK, which was also listed as a terrorist organization by the United States and the European Union, launched an armed campaign for an ethnic homeland in the mainly Kurdish southeastern Turkey in 1984, sparking decades of strife that has claimed more than 30,000 lives.