Three brothers arrested after explosion at US embassy in Oslo

Three brothers have been arrested in Norway linked to an explosion outside the US embassy in the capital, Oslo, on Sunday. The authorities believe the blast was caused by an improvised device that was placed at the building's entrance. It caused minor damage and no injuries were reported. The brothers, all in their 20s, are Norwegian citizens with links to Iraq, Norway's police attorney Christian Hatlo told a press conference on Wednesday. Among them is thought to be a suspect police had previously released images of, broadcaster NRK reported. "They are suspected of a terror bombing," Hatlo said. None of the brothers, who have not been named, were previously known to police. The authorities are investigating several theories about the motivation for the attack, including whether a foreign state actor was involved. "The most important thing is to get them [the suspects] questioned, then we'll see what happens," Hatlo said. As well as the images released earlier this week, investigators have also been examining a video published on Google Maps around the time of the incident. The now-deleted video featured Iran's former supreme leader Ayatollah Ali Khamenei, local media reported. He