Turkish police on Friday has carried out raids against PKK terrorist organization in Istanbul and detained one suspect.The police have reportedly raided houses in various districts throughout the city and also searched parked vehicles. The suspect was brought to Istanbul Police Department's headquarters in Vatan Avenue. Turkey has been hit by violence since a suicide bomb attack by a suspected ISIS supporter killed 32 activists in Suruç on July 20. 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 has been fighting the Turkish government for an independent state until the early 2000's. The group then shifted its goal to autonomy in predominately Kurdish inhabited regions of Turkey.The PKK announced on July 11 that the cease-fire which was declared via a message from the PKK's imprisoned leader Abdullah Öcalan in 2013 has ended. Turkish security forces have arrested hundreds of people with suspected links to ISIS, the PKK, and leftist groups, detaining over 1,300 people across the country, according to a recent statement released by the Prime Minister's Office.The Turkish Air Force has been carrying airstrikes against the PKK in northern Iraq and the ISIS militants in northern Syria.According to military sources, over 900 terrorists were killed in Turkey's airstrikes against PKK's hideouts and camps in northern Iraq. The PKK is also accused of using civilians as human shields in its camps.