France's domestic intelligence agency has detained a 26-year-old Russian-Ukrainian man on suspicion of planning a violent act after he injured himself in an explosion, the National Anti-Terrorism Prosecutor's Office said on June 5. The man was treated for burns on June 3 after an explosion in his hotel room, where the prosecutor's office said "products and materials intended to manufacture explosive devices" were found. The man was arrested close to Paris's Charles De Gaulle Airport. France is on maximum threat alert ahead of the start of the Paris Olympics in July.