From CBS News:

Russian police have arrested four gay rights activists protesting in St. Petersburg on the opening day of the 2014 Sochi Winter Olympics.

During Friday's protest, four gay activists unfurled a banner quoting the Olympic Charter's ban on any form of discrimination. The protesters, who gathered on St. Petersburg's Vasilyevsky Island, were quickly rounded up by police, according to Natalia Tsymbalova, a local lesbian, gay, bisexual and transgender activist.

The gay rights group All Out told CBS News in an emailed statement that one of the protesters arrested was associated with the organization.

“We just learned that 4 gay rights activists were arrested in St. Petersburg—including All Out's long-term contact and friend Anastasia Smirnova—for taking photos with a banner referring to Principle 6 of the Olympic Charter ‘Discrimination is incompatible with the Olympic Movement.’