Police in Moscow on August 25 detained three people on Red Square commemorating the 50th anniversary of the 1968 protest there against the Soviet-led invasion of Czechoslovakia.
Those detained included relatives of two of the eight protesters who were hauled away by Soviet secret police fifty years ago for protesting against the invasion by Warsaw Pact troops that brought an end to Czechoslovakia's attempted liberalization of the communist system.
Those detained at the August 25 commemoration included veteran Russian liberal politician Leonid Gozman and rights activist Sergei Sharov-Delaunay -- a cousin of the late Vadim Delaunay, a Soviet poet dissident who participated in the 1968 action.
Also detained was Anna Krasovitskaya, granddaughter of the late poet and translator Natalya Gorbanevskaya, who was held in a psychiatric hospital after her arrest for the 1968 protest and later emigrated to the West.
Gozman and Delaunay were detained as they attempted to unfurl one banner that read "For Our Freedom And Yours" and another honoring the 1968 protesters, according to a correspondent for RFE/RL's Russian Service at the scene.
Krasovitskaya stood with a placard supporting Ukrainian filmmaker Oleh Sentsov, who is currently on an extended hunger strike to protest his imprisonment in Russia
Sentsov, a vocal opponent of Russia's 2014 annexation of Crimea, was sentenced in 2015 for conspiracy to commit terrorist acts, charges he and human rights groups say were politically motivated.
Gozman, Sharov-Delaunay, and Krasovitskaya were all later released but were written up for allegedly violating laws on public demonstrations, according to the Russian news portal OVD-Info, which tracks detentions of protesters.
One of the original 1968 protesters -- physicist Pavel Litvinov -- was among the dozens of participants in the August 25 demonstration.
Litvinov is one of only three surviving 1968 protesters, most of whom suffered years of exile or imprisonment due to the action.
In June, the Czech Republic honored the three -- Litvinov, Tatyana Bayeva, and Viktor Fainberg -- to mark the 50th anniversary of their protest.