By Stine Jacobsen and Nikolaj Skydsgaard COPENHAGEN (Reuters) – Three people were killed and several more were wounded in a shooting at a shopping centre in Copenhagen on Sunday, Danish police said, adding they had arrested a 22-year-old Danish man and charged him with manslaughter. The attack rocked Denmark at the end of an otherwise joyful week, just after it hosted the first three stages of the Tour de France cycle race. The event had sent hundreds of thousands of cheering Danes into the streets across the country. “Denmark was hit by a cruel attack on Sunday night. Several were killed. Eve…