Seattle hospital lockdown: Police are looking for the man at the Evergreen Health Medical Center

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Kirkland police scoured EvergreenHealth Medical Centre in Seattle, Washington, looking for the man – after a CCTV image of him was circulated on social media.

The man, who appeared to be wearing a woolly hat and glasses, was carrying the "ornate umbrella" on his back.

US cop Cody Mann said officers had searched the hospital room by room amid fears it was a rifle.

An image of the umbrella on social media shows it has a sword-like handle.