2016 Irkutsk mass methanol poisoning
In December 2016, over 70 people died of methanol poisoning in the Russian city of Irkutsk. Caused by the consumption of adulterated surrogate alcohol, it was the deadliest such incident in Russia's post-Soviet history.
Source: Wikipedia — 2016 Irkutsk mass methanol poisoning (CC BY-SA 4.0)