Turkey and the United States have created a joint working group in connection with Ankara's purchase of Russian S-400 air defence systems, and the countries are already engaged in technical negotiations, Turkish Foreign Minister Mevlut Cavusoglu said on Wednesday.
"We have created a joint working group with the US on the S-400, we have already started technical negotiations", Cavusoglu said at a press conference.
The US imposed sanctions earlier this month on Turkey's Presidency of Defence Industries (SSB) and its head, Ismail Demir, as well as on three other individuals related to the defence industry presidency.
The sanctions banned all US exports to the SSB and froze the assets of the designated persons.
Following the move, Turkish President Recep Tayyip Erdogan slammed the sanctions but noted that they won't stop Ankara from pursuing attempts to defend its rights.
The United States has expressed concern over the S-400's interoperability with NATO defence systems and a potential security threat. Turkey has stated that there would be no issue of integration with NATO systems and no threat to the alliance's security.