The team of jailed Kremlin critic Alexey Navalny called for massive protests across Russia next week to help save the life of the hunger-striking opposition leader, who doctors warn could die in a matter of days.

Navalny is President Vladimir Putin’s most prominent opponent and the street protests are to be held just hours after the Kremlin chief is set to deliver his long-awaited state of nation address on Wednesday.

“It’s to time to act. We are talking not just about Navalny’s freedom but his life,” Navalny’s right-hand man Leonid Volkov said on Facebook.

Volkov said Wednesday’s rally, set for 7PM local time, could become a decisive battle against “absolute evil” or Russia’s last opposition rally for years to come.

“Call on all your acquaintances and take to central squares,” wrote Volkov, who heads Navalny’s regional offices, adding that the protests should be massive.

“Don’t think that nothing depends on us.”

Authorities have ramped up pressure on Navalny’s supporters in recent months, detaining more than 10,000 protesters at opposition demonstrations in January and February.