Russian opposition politician Alexei Navalny shared a photograph from a Berlin hospital on Tuesday, sitting up in bed and surrounded by his family, and said he could now breathe independently after being poisoned in Siberia last month.

The photo — the strongest evidence yet of Navalny's advancing recovery after emerging from a coma last week — was swiftly followed by confirmation from his spokeswoman that he planned to return to Russia.

"Hi, this is Navalny. I miss you all," he wrote in the caption to his Instagram followers. "I can still hardly do anything, but yesterday I could breathe all day on my own. Actually on my own."