Heavy smog has been covering Russia's capital due to forest fires which have been raging for three days.

Moscow has been enveloped in the dangerous grey haze with air pollution levels eight times higher than normal.

Temperatures in and around the capital have been close to 40 degrees Celcius, with drought conditions now appearing.

Peat bogs and forest trees are still ablaze as firefighters struggle to get the flames under control.

The Russian prime minister, Vladmir Putin, has provided over 620 million euros to deal with the emergency over what has become one of Russia's hottest summers since records began.