Three people have been taken to hospital after masked attackers stormed a meeting in Swedish capital Stockholm, police said on Wednesday, adding that they had begun an investigation. An evening event by the Left Party about growing fascism in Sweden was just about to start when a group of masked people entered the venue, said anti-racist foundation Expo, which had a member participating in the event. The attackers used self-defence spray and tossed smoke grenades, Expo said on its website.