Man with crossbow at Queen's Castle

He was arrested on suspicion of breach or trespass of a protected site and possession of an offensive weapon.

The Metropolitan Police said on Sunday that the man was taken into custody and has undergone a mental health assessment.

He has since been sectioned under the Mental Health Act and remains in the care of medical professionals, the force added.

A spokesperson from Scotland Yard said: "Security processes were triggered within moments of the man entering the grounds and he did not enter any buildings.

"Following a search of the man, a crossbow was recovered."

They added: "Inquiries into the full circumstances of this incident are being progressed by Metropolitan Police specialist operations."