Justice Department spokesperson Nicole Navas Oxman told Sputnik that the four individuals detained on August 1 and 2 are: Stanislav Lisitskiy, Aleksei Livadnyi,Nikolay Tupikin and Kirill Dedusev.
The Justice Department also said that another Russian national, Maxim Suverin, was arrested on July 30 in Boston, Massachusetts, via a criminal complaint.
Earlier, that Russian Consulate General has sent an inquiry to the Federal Bureau of Investigation to get an access to the arrested Russian citizens.
Oxman said on Monday that the most recent arrests of Russian nationals in the US state of California is related to a multimillion-dollar fake advertisement scheme for cars.
Meanwhile, Russian Embassy in the United States announced that it had requested a clarification from the US State Department on the situation around the detentions. The embassy noted that is following the development of the situation closely.
"The embassy is closely monitoring the situation surrounding the detention by the FBI of Russian citizens. We have referred to the [US] State Department for clarification of the matter and requested information about the whereabouts of the detainees. We are working to establish a direct link with the detainees in order to ensure that their legal rights are being implemented," the statement by the embassy's press service read.