At least six suspects have been detained in an anti-terror operation in Istanbul early on Wednesday.
Anti-terror police raided a four-story property reportedly linked to the youth wing of an ultra-left terrorist organization which has been behind a series and gun and bomb attacks in Turkey.
The Revolutionary People's Liberation Party-Front (DHKP-C)-linked address was in Istanbul's Okmeydani neighborhood, police said.
Riot police, backed by helicopter, water cannon and supported by the fire department, conducted the operation.
Earlier in March, two Turkish police officers were injured in a gun-and-grenade attack in the city's Bayrampasa district. Two female assailants, both said to be members of the terrorist DHKP-C, were later "neutralized" in a follow-up operation.
The DHKP-C is listed as a terrorist organization by Turkey, the U.S. and EU.
The group has carried out a number of attacks in Turkey, including a suicide bombing on the 2013 U.S. embassy in Ankara and an attack targeting the U.S. Consulate General in Istanbul last year.
Source: Anadolu Agency