A shopping centre has been evacuated after a fire broke out in a department store less than 24 hours after a vehicle smashed into the building during a terrifying rampage.

Several people have been treated for injuries at the scene as police have arrested one person in connection to the attack in Finland - a witness said there was 'a lot of blood' ...

The pair clashed with security at Northland Shopping Centre, in Melbourne 's north-western suburbs, just hours after the mall was evacuated due to a fire.