The Moscow-based Memorial Human Rights Center says the leader of anti-landfill protests in the city of Kolomna near the Russian capital is a political prisoner.
The group made the announcement in a statement posted on its website on February 21, saying that Vyacheslav Yegorov was being persecuted because of his sociopolitical positions.
Yegorov, 41, is an activist with the No Dump In Kolomna public group, which opposes the dumping of garbage from Moscow in landfills in the area of Kolomna, a historic city of some 140,000 people located about 120 kilometers southeast of the Russian capital.
Since February 2, Yegorov has been held under house arrest while facing a charge of repeatedly violating regulations on holding public gatherings and protests.
Russia's Criminal Code envisions criminal prosecution for at least three violations of the law on public gatherings in six months, a provision which Memorial said is illegal because it contradicts the constitution.
If convicted, Yegorov could be sentenced to up to five years in prison.
Vyacheslav Yegorov last year led several rallies protesting the environmental consequences of poorly managed landfills and household-waste disposal in Kolomna.
Similar rallies have been held in recent months in other Russian cities and towns.
The latest such rallies took place in 30 Russian regions on February 3.