"We are concerned about the potential consequences of Turkey's decision to acquire the S-400 system", a North Atlantic Treaty Organisation official said, following repeated warnings that the Russian system is incompatible with allied weapons.
Turkey's acquisition of the Russian system is a source of tension between Turkey and North Atlantic Treaty Organisation ally United States.
It has said it was forced to buy the S-400s because Washington refused to supply the American-made Patriot systems to Turkey.
A Defense Ministry statement said "the first group of equipment" of the S-400 air defense systems has reached the Murted Air Base near the capital, Ankara.
After meeting President Donald Trump at a G20 summit last month, Turkish President Recep Tayyip Erdoğan said the U.S. did not plan to impose sanctions on Ankara for buying the S-400s.
Turkey's foreign ministry spokesman said the comments by the State Department's Morgan Ortagus on Tuesday were not in line with the spirit and content of talks between presidents of the two countries at the G20 summit last month.
Turkey has urged formation of a commission to clarify any technical issues, but the U.S. has failed to respond to this proposal. Washington has stated that it will exclude Ankara from the F-35 program if Turkey buys the S-400 systems.
Sanctions would mark a new low in the already-tense relations between Turkey and the U.S. Last year, the United States imposed sanctions on Turkey over its detention of an American pastor, triggering a Turkish currency crisis. Last week United States officials said the administration still planned to impose sanctions on Turkey.
Erdogan has defended his $2.5 billion acquisition of the Russian system as part of Turkey's sovereign right to defend itself, and said he tried to purchase the US -made Patriot air defense system but was not offered favorable terms.
The first delivery of the Russian S-400 advanced long-range anti-aircraft missile system, also known as the SA-21 Growler, has arrived in Turkey. "There's no problem and the process will continue in a healthy way going forward".
The US has repeatedly said that the Russian system is incompatible with North Atlantic Treaty Organisation systems and is a threat to the F-35.
Turkey says the system is a strategic defence requirement, particularly to secure its southern borders with Syria and Iraq. Last month, the Pentagon revealed plans to phase out Turkey's participation in the F-35 program altogether by July 31. The S-400 system can engage targets at a distance of 400 km and at an altitude of up to 35 km.