With Russia on Covid-19 lockdown, 77 houses were burned down in Novosibirsk and Kemerovo regions.
Flying knives and chairs were reportedly seen by residents of Maraksa village.
Four children among those hit by the infection which has spread from a beast slaughtered this year.
The 15th INNOVUS forum opens over two days with 50 events aimed at discussing Russia's Innovative Development Strategy until 2020.
With smoke having blown as far as the US and Canada, experts now say 'the trend is positive' in controlling fires raging from the Urals to the Pacific.
Krasnoyarsk and Novosibirsk suffering smoke pollution and infernos rage in forests after hot, dry weather.
The helicopter carrying 17 people lurched on its side on takeoff, with 5 described as being in a 'grave' condition.
More than ten new oil deposits are discovered in Krasnoyarsk region, one of them of major significance.