AN armed man has been arrested at the entrance of Buckingham Palace, London police have confirmed.

Police said the 38-year-old was carrying a Taser stun gun, adding that he remains in custody.

“It’s not terrorism related. It’s just a single stand-alone incident,” a police spokeswoman told AFP.

He was detained at the visitor entrance as he as passing through an “airport style” security gate, The Sun reports.

The suspect now remains in custody at a central London police station.

Authorities have ruled out the possibility it was terror related.

Members of the royal family are currently on their summer break, with Queen Elizabeth II and Prince Philip staying at Balmoral Castle in Scotland.

London remains on a heighten state of alert due to periodic terror-related incidents.

Most recently, in August, a terror suspect crashed his car into the security barriers surrounding the Houses of Parliament.

A Sudanese-born 29-year-old has been charged with two counts of attempted murder.