A 25-year-old man has been arrested in the Royal Mews area adjacent to Buckingham Palace.
Officers at the royal residence responded to a person climbing the wall and entering the Royal Mews at 1.25am on Saturday, the Metropolitan Police said.
Following a search, a man was detained outside the stables.
He did not enter the palace or its gardens at any time, the force added.
The man has been arrested on suspicion of trespassing on a protected site, which is an offence under the Serious Organised Crime and Police Act, and remains in custody at a London police station.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article