How to Use of unknown origin in a Sentence

of unknown origin

phrase

• Before that, Munich Airport in Germany had to shut down for hours after drones of unknown origin were seen in the sky nearby.
  — Jordan King, MSNBC Newsweek, 10 Oct. 2025
• Earlier, Munich Airport in Germany had shut down for hours after drones of unknown origin were seen in the sky nearby.
  — Shane Croucher, MSNBC Newsweek, 3 Oct. 2025
• Boxes and bags of unknown origin were hidden under coats and rushed to the bedroom for wrapping long before a Douglas fir spread its branches in the corner of the living room.
  — Charles Davis, Christian Science Monitor, 19 Dec. 2025
• Suddenly, an actual external parasite of unknown origin seemed to be its main topic, notwithstanding when it was written.
  — Chris Jones, Chicago Tribune, 9 Jan. 2026
• The fire of unknown origin is considered the worst maritime disaster in modern California history.
  — City News Service, Daily News, 4 Mar. 2026
• In this horror comedy, a teenage girl and her younger brother must survive a wild 24-hours during which a mass hysteria of unknown origin causes parents to turn violently on their own kids.
  — Kirby Adams, The Courier-Journal, 19 Aug. 2025
• However, Israel Police later confirmed that the ancient church ruins were undamaged and that the fire, of unknown origin, was confined to a nearby open area.
  — Amelie Botbol, FOXNews.com, 10 Aug. 2025
• Early on, renovation workers discovered mysterious secret tunnels of unknown origin and use.
  — Richard Mize, Oklahoman, 27 Feb. 2026
• Shooting down drones Americans developed a keen interest in hostile drones over the last couple of years as hundreds of pilotless aircraft of unknown origin ran forays over Air Force bases and overflew cities.
  — Ray Stern, AZCentral.com, 2 July 2025