According to Sviridov, Polish intelligence told him that his presence in the country posed a "real and serious" threat to national security.
In June, the same Polish Court heard, and rejected, the first appeal to gain access to the first batch of documents in the case.
"At this court hearing, the discussion turned to the declassification of the second part of secret documents that emerged in my client’s case in February this year," Jaroslaw Chelstowski stated, commenting on the legal developments in his client's case.
Chelstowski added that his client intended to ask for the court decision in written form and, later, to appeal the ruling in Poland's Supreme Administrative Court.
In December 2014, Russian Ambassador to Poland Sergei Andreev said the Russian correspondent had been persecuted in Poland for his professional activities. In January, the diplomat expressed hope that the Russian journalist would be able to continue his work in Warsaw.
In late April, Sviridov's Polish residence permit was canceled, however, the decision was contested the following month.