International Desk: A gun attack has been reported at a shopping mall in Copenhagen, the capital of Denmark. Three were killed and at least four were injured in what became known as the Cold War. Police said the dead included two 18-year-old Danish nationals and a 48-year-old Russian national. In addition, two injured Denis and two Swedes have been admitted to the hospital in critical condition. A 22-year-old man was arrested in the incident. Police Chief Sovereign Thomasen said the attacker was mentally ill. No evidence was found of his involvement in terrorist activities. The identity of the suspected attacker has not yet been revealed, the BBC reported. He will face questioning by a judge on Monday. Prime Minister Mate Fredericksen called it the "most brutal attack in Denmark". He called on the Danes to stand together and support each other during this difficult time. Expressing frustration over the incident, he added, "Our beautiful and safe city seems to have changed in a second."