Police in Moscow have detained three people after they attached Ukraine's national flag to scaffolding on a Stalin-era skyscraper.
The stunt took place on November 23, two years after the start of the Euromaidan protests that ousted former President Viktor Yanukovych in February 2014.
In August last year, five Russian men and women held a similar stunt in which a Soviet red star atop the same building was painted in the yellow-and-blue colors of the Ukrainian flag.
A Moscow court found one of the activists guilty of hooliganism and vandalism, and sentenced him to 27 months in prison.
The other four were acquitted.