Turkey will not turn back from its acquisition of Russian S-400 defense systems despite US sanctions, it said on Thursday, but added it would seek to resolve issues with its NATO ally through dialogue, Reuters reported.

Speaking in an interview with state broadcaster TRT Haber, presidential spokesman Ibrahim Kalin said talks were being held with Washington over disagreements, but that quick solutions to problems should not be expected.

“The United States has so far said it will not engage in any negotiations over this issue (S-400s). Turkey will not turn back from the Russian S-400 issue,” Kalin said.

“When we read the strategic picture the right way, we think we can make advances,” he said. “By proposing solution ways, we will be in negotiations,” he added, without elaborating.