The funeral of Russian opposition leader Aleksej Navalnyj, held in Moscow, has sparked concerns over potential arrests of attendees.

Security measures around the ceremony were extensive, with riot police and barricades already in place a day before.

Navalnyj's supporters were encouraged to attend despite the risks, as expressed by his spokesperson Kira Yarmish on social media.

The Russian authorities' strict security efforts and the difficulties faced by Navalnyj's team in arranging the transportation of his body highlight the tense atmosphere surrounding the event.

Navalnyj's widow, Julija Navalnaja, voiced fears of new unrest and possible police action against mourners in a speech to the EU Parliament.