Interfax news agency reports citing own source in a Russian law enforcement agency, Censor.NET informs.
A source told the agency that another two persons detained in the case of terrorism were residents of the peninsula who had recently received Russian citizenship.
According to the agency's interlocutor, the law enforcers already have nine people in custody as of today, including two of them under arrest. In the next 24 hours, they could be charged with offenses including under the articles covering organization of a terrorist act and aiding and abetting terrorist activities.
About 10 more people have the status of witness in the case. The investigation is to assess the roles they have played in the recent events. The source did not rule out that the status of some of them could be changed to the one of the suspect.
As previously reported, the situation on the administrative border with the peninsula turned critical early in the morning of Aug. 7. Since that moment, the occupation authorities have repeatedly altered the access mode at three checkpoints, either closing them or resuming their work in full or partially.
A number of Crimean media reported the introduction of Krepost (Fortress) plan aimed at tracking down five camo-clad persons. Eyewitnesses mention checkpoints set up on the main roads with the traffic police and OMON fighters stopping buses and checking passengers. At 4:30 a.m., Aug. 10, the Russian side opened the Kalanchak checkpoint near Armiansk that had been closed since Aug. 7.
On Aug. 10, the FSB released an official statement about averted terrorist attacks in annexed Crimea "prepared by the Main Intelligence Directorate of Ukraine's MoD in order to target critical life-supporting and infrastructure facilities inside the peninsula." Further on, the FSB released a video with the alleged organizer of the thwarted "terrorist acts" in the occupied Crimea, Zaporizhia region resident Yevhen Panov.
Russian President Vladimir Putin, in turn, said that Ukraine "has switched to the practice of terror."
Putin also said he considered the upcoming Normandy Four meeting to be pointless in the light of the alleged detention of Ukrainian "saboteur" in occupied Crimea.
Putin's puppet of the so-called "parliament" of Crimea Remzi Ilyasov said the occupying authorities perceive the incident "as an act of aggression, in fact, a declaration of war."
The General Staff of the Armed Forces of Ukraine denied all Russia's allegations, calling them provocative.
National Security and Defense Council Secretary Oleksandr Turchynov described the hysterical and false allegations by Russia's FSB as groundless and called them another element of Russia's hybrid war against Ukraine and an attempt to exacerbate the situation in the occupied territory.
The Ukrainian MoD has refuted the FSB's allegations on the involvement of Ukraine's intelligence in subversive activities in Crimea and called them an attempt of the Russian Federation to justify its aggression in the territory of the annexed peninsula.
President Petro Poroshenko said that the Russian allegations are groundless and serve as "a pretext for more military threats against Ukraine."
Spokesperson to the U.S. Department of State Elizabeth Trudeau said that the Russian Federation's recent allegations on Ukraine's involvement in "subversive activities" in Russian-occupied Crimea should not distract the United States from the real issue Russia has created in Ukraine.
On Aug. 11, President of Ukraine Petro Poroshenko instructed that all the units deployed at the administrative border with Crimea and the demarcation line in the Donbas be on high alert.
Ihor Kotelianets, Panov's brother, claims Yevhen was kidnapped in Ukraine's Zaporizhia region and taken to the occupied peninsula.
According to Ukraine's Defense Intelligence, none of its employees has been detained by the FSB to date in the territory of occupied Crimea.
The police have qualified the fact of Yevhen Panov's disappearance reported by his relatives as a criminal offence under the article 146 (illegal deprivation of freedom or abduction) of the Criminal Code of Ukraine.
First Deputy Chairman of the Verkhovna Rada, Ukraine's representative in the humanitarian subgroup of the Trilateral Contact Group Iryna Herashchenko says Yevhen Panov has become another kidnapped Russian hostage who Ukraine will have to liberate.