According to Reuters, citing a copy of the document, Turkish authorities have indicted a third employee from the US Consulate in Istanbul on charges of membership in a terrorist group.
The prosecution is seeking a jail term for the three people on charges of membership in a terrorist group, the indictment said as quoted by Reuters.
Ankara, as well as Washington has yet to officially confirm the media report.
Relations between Washington and Ankara deteriorated in 2017 after Metin Topuz, a Turkish citizen locally employed at the US consulate, was detained in Turkey.
Following the arrest, the US suspended visa services with Turkey, while the latter responded with tit-for-tat measures.
A week later, the Turkish authorities issued an arrest warrant for another Turkish staffer.