Istanbul, Jul 13 (AP) Turkey has continued receiving components of a Russian-made air defence system for a second day, despite Washington’s warnings that it will impose sanctions on the NATO-member country.

Turkey’s defence ministry tweeted Saturday the landing of a fourth Russian cargo plane in Murted Air Base, near the capital, Ankara.

On Friday, the ministry announced the much-awaited delivery of S-400 components had begun.

The United States has repeatedly warned it will impose economic sanctions and kick Turkey out of the F-35 stealth fighter jet program if Ankara does not drop its S-400 purchase. Turkey has refused to bow to U.S. pressure, saying its defence purchase is a matter of national sovereignty.

The U.S. administration was publicly silent Friday on how it would respond to the delivery. (AP)