Alexei Navalny: Putin critic dies after 'losing consciousness' at maximum security prison

Russian opposition leader Alexei Navalny - a vocal critic of President Vladimir Putin - has died, according to the country's prison service.

The jailed dissident, who had campaigned against official corruption and led major anti-Kremlin protests, was 47.

Mr Putin, who is running for re-election in a month, has been informed of his death, according to the state news agency TASS.