Polish Prime Minister Donald Tusk has officially confirmed that the blaze was an act of arson orchestrated by Russian intelligence.

Polish authorities have confirmed that the arson attack on a major Warsaw shopping center was coordinated by Russian intelligence, with suspects also tied to a similar incident in Lithuania.

Russia was behind the fire that completely destroyed a shopping centre in Warsaw last May, Poland has suggested. Moscow has in the past denied involvement in alleged arson and sabotage operations across Europe.