Prosecutor General Viktor Shokin said it at a briefing on Monday, Censor.NET reports citing Ukrainska Pravda.
He recalled that a large-scale special operation had been conducted, involving PGO investigators and SBU officers.
"Not all persons have been detained as planned. Unfortunately, some individuals managed to escape," Shokin said.
"They will not get far way. We will track them down and bring to justice," he added.
As reported, SBU officers detained Hennadii Korban on Oct. 31. Borys Filatov, member of the political council of Ukrainian patriots association - UKROP, said party's members were searched by police extensively.
In turn, the PGO and the SBU reported they had detained persons who were directly involved in an organized criminal group. They say searches are part of a large-scale operation intended to eliminate the organized criminal group.
The incriminated articles of the Criminal Code of Ukraine are 255, 191 (embezzlement) and 349 (kidnapping), while the PGO is investigating Korban's possible leadership of the group.
Related materials: Korban's arrest