(Reuters) - Jailed Kremlin critic Alexei Navalny has complained of being poisoned, assaulted and deprived of proper medical care, but on Monday he disclosed he faced a new challenge: being forced to listen to a pro-Putin pop singer at 0500 every morning.

Navalny, 47, a former lawyer who rose to prominence more than a decade ago by lampooning President Vladimir Putin’s elite and voicing allegations of vast corruption, is currently in a jail about 60 km (40 miles) north of the Arctic Circle.

Sentenced to stay in prison until he is 74 on charges he says were trumped up to keep him out of politics, Navalny said his morning regime now consisted of listening to the Russian national anthem before being played “I am Russian,” a patriotic song performed by a pro-Putin singer called “Shaman”.