Man is a British national of Polish descent , but has not yet been identified . He was arrested on Saturday as part of an operation against the DHKP - C . Banned leftist militant group took senior Turkish leader Mehmet Selim Kiraz hostage in custody last week . Both Kiraz and hostage takers were killed in the resulting hostage shoot - out .
Man is a British national of Polish origin , but has not yet been identified . He was arrested on Saturday as part of an operation against the DHKP-C . Banned leftist militant group took senior Turkish prosecutor Mehmet Selim Kiraz hostage in Istanbul last week . Both Kiraz and hostage takers were killed in the resulting police shoot-out .