shooting on 25 June in the nightlife district of Norway's capital.A total of four suspects have now been arrested, including the suspected gunman, a 43-year-old Norwegian citizen of Iranian origin.The two latest suspects — a man in his 40s with Somali citizenship and a Norwegian national in his 30s — were arrested on Sunday and were known to the authorities.On Friday, Oslo police also announced that they had issued an international arrest warrant for a 45-year-old "Islamist", who they believe is in Pakistan."To ensure the best possible cooperation with the Pakistani authorities, we had Oslo police officers in Pakistan a short time ago," a police spokesperson said..