Russia's Parliament is to consider a federal law that makes public events and dissemination of information on the lesbian, gay, bisexual and transgender, or LGBT, community to minors punishable by fines of up to $16,000.
Many, including Russia's dominant Orthodox church, have hailed the law saying it will boost Russia's dwindling birth rates.
Three dozen LGBT rights campaigners gathered Friday near the State Duma in Moscow to protest the law, while militant Orthodox activists started assaulting and pelting them with eggs. Police intervened, but mostly detained the LGBT campaigners.
Russia decriminalized homosexuality in 1993, but homophobia remains high in the country.