Supporters of Kremlin critic Alexei Navalny held candle-lit gatherings in residential courtyards across Russia on Sunday despite warnings that they could be arrested.

Navalny’s allies have declared a moratorium on street rallies until the spring after police detained thousands of people in the past few weeks at protests against the Opposition politician’s arrest and imprisonment.

But they wanted Russians to show solidarity with Navalny by gathering outside their homes for 15 minutes on Valentine’s Day evening, shining their mobile phone torches and arranging candles in the shape of a heart.

People on social media posted pictures of themselves holding candles or phones with flickering flashlights across Russia.

Navalny was arrested last month on his return from Germany following treatment for poisoning with what many Western countries say was a nerve agent.