Erdogan says Turkey tested Russian S-400s

Turkish President Tayyip Erdogan confirmed on Friday that Turkey had been testing the S-400 air defense system it bought from Russia, adding that the objection from NATO ally United States on the issue did not matter.

Washington says Ankara's purchase of Russian S-400 systems compromise NATO defences, and has threatened sanctions. An apparent firing test of S-400s test last week prompted a furious response from the State Department and Pentagon.

The president added that he hoped that the sides in the Libya conflict will abide by the ceasefire which they signed, but "its reliability does not seem too achievable to me."

"Time will show how lasting it will be," Erdogan told reporters after Libya's warring sides signed a permanent ceasefire deal on Friday.