The banking sector also came under pressure from a 8.6% decline in France's Societe Generale as it reported a quarterly loss, while Britain's Lloyds Banking Group became the latest to be hit by provisions against expected bad loans due to the pandemic.
Along with a slide in energy stocks as oil major Royal Dutch Shell slumped 10.8% on cutting its dividend for the first time in 80 years, London's FTSE dived 3.5%. The index logged its steepest one-day loss in one month.
The wider oil & gas sector fell 3.4%. The pan-European STOXX 600 fell 2% after a three-day rally, while euro zone stocks were down 1.9%.