US President Barack Obama said security relations with Turkey have not diminished as a result of a failed Turkish coup attempt in mid-July, according to excerpts of an interview with CNN to be broadcast on Sunday. 'We haven't seen a diminishing effect on our security relations. Turkey continues to be a strong NATO ally,' Obama said. 'They are working with us to defeat ISIL and are an important partner on a whole range of security issues in the region,' he said, using an acronym for Islamic State.