Russian police have detained an activist at an improvised memorial near the Kremlin where Russian opposition politician Boris Nemtsov was gunned down last year.
OVD-Info online news portal reports that Andrei Darklait was watching over the site overnight when police detained him. No more details were available.
Activists have organized a night watch at Nemtsov's memorial because it has been vandalized at least four times since January.
Nemtsov was fatally shot on a bridge near the Kremlin on February 27, 2015.
Several men from the North Caucasus region have been arrested and charged with Nemtsov's killing.
Nemtsov's relatives and lawyers have expressed skepticism about the probe, insisting the killing must have been ordered by high-ranking Russian officials.