Forty workers die in <a href="https://en.wikipedia.org/wiki/Lapua_Cartridge_Factory_explosion" id="mw8Q" rel="mw:WikiLink" title="Lapua Cartridge Factory explosion">an explosion</a> at the <a href="https://en.wikipedia.org/wiki/Lapua#Lapua_State_Cartridge_Factory" id="mw8g" rel="mw:WikiLink" title="Lapua">Lapua ammunition factory</a>, the deadliest accidental disaster in modern history in <a href="https://en.wikipedia.org/wiki/Finland" id="mw8w" rel="mw:WikiLink" title="Finland">Finland</a>.