An explosion occurred in a building in Monaco, injuring three people, two of whom are in serious condition. Government officials are currently investigating the incident and have indicated that initial findings suggest a deliberate act. The cause of the explosion remains under investigation, but authorities are treating it as a potential arson case. Emergency services responded to the scene and provided medical attention to the injured. Further details regarding the extent of the damage to the building and the identities of those involved have not yet been released. The government spokesperson confirmed the possibility of malicious intent, prompting a full-scale investigation into the circumstances surrounding the blast.