Two suspected members of the outlawed DHKP-C group have been killed in an operation to free a captive Turkish prosecutor on Tuesday in Istanbul.

The prosecutor, however, has also died after being seriously injured during the operation that led to his rescue.

After six-hour-long negotiations over the phone, security forces reportedly had to intervene after hearing "gunshots" on the other end of the telephone, according to Istanbul Police Chief Selami Atlinok, cited by H?rriyet Daily News.

A media blackout had been imposed by the government while talks were ongoing.

The leftist organization DHKP-C had demanded that police officers who fatally wounded the boy named Berkin Elvan during the 2013 street protests (Elvan died 269 days later after having been in a coma all the time own up to the "murder".

Prosecutor Mehmet Selim Kiraz had been in charge of the case.

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