A man has been arrested on suspicion of attempted murder after confronting police with a knife in Westminster.
The 29-year-old was said to have approached two Ministry of Defence Police officers in Horse Guards Parade at around 8.50am on Monday.
Police used a Taser on the man before restraining him and placing him under arrest on suspicion of attempted murder and possession of an offensive weapon.
No one was injured and the man remains in custody at a central London police station.
The incident is not being treated as terror-related, the Met Police said.
The force added it would be working alongside the MoD Police as it carried out an investigation.
Police are appealing for anyone who may have witnessed the incident or otherwise has information to call 101, providing the reference 1730/18APR.
Information can also be provided to Crimestoppers, anonymously, on 0800 555 111.
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