Russia’s Federal Security Service (FSB) announced Tuesday that it has opened criminal cases against at least seven Western journalists who illegally crossed the state border of the Russian Federation near Sudzha in the Kursk region.

The FSB stated that the journalists were charged with violating Part 3 of Article 322 of the Criminal Code of the Russian Federation, which punishes illegal crossing of the state border of the Russian Federation, committed by a group of persons by previous concert, or by an organized group, or with the use of violence or threats of its use with up to five years imprisonment.

This comes following Ukraine’s August 6 incursion into the Russian Kursk region that borders Ukraine’s Sumy region. Ukraine claims to have captured 1,000 square kilometers since then, including settlements such as Sudzha. Western media organizations, including CNN, were invited by the Ukrainian side to report on the territory they occupied in Kursk. This included Nick Paton Walsh, CNN’s chief international security correspondent, and Connolly Nicholas Simon, a journalist from German television and radio broadcasting corporation Deutsche Welle, and Nagornaya Natalia Viktorovna from Ukraine’s television channel 1+1. The FSB announced that it had opened cases against these journalists and that it was investigating other illegal entries into the territories of the Russian Federation.

Earlier this month Wall Street Journal journalist Evan Gershkovich was released as part of a major prisoner swap between the US and Russia. Gershkovich was arrested during a reporting trip in central Russia after Moscow accused him of gathering secret information.