A journalist who filmed the last video of Russian opposition politician Alexei Navalny before he died, Antonina Favorskaya, has been detained by authorities.

Favorskaya covered the trials of Navalny for several years and media freedom organisation Reporters Without Borders said on Thursday she was one of six journalists across the country held this month.

Russian authorities detained Favorskaya late on Wednesday and accused her of taking part in an “extremist organisation” by posting on the social media platforms of Navalny’s Anti-Corruption Foundation, the Russian human rights group OVD-Info said.

Navalny’s spokeswoman Kira Yarmysh, said that Favorskaya didn’t publish anything on the foundation’s platforms and suggested that Russian authorities targeted her because she was doing her job as a journalist.