Two people were arrested for trespassing and burglary at the Buckingham Palace, according to CNN.
The British police arrested the two men but are still investigating the incident in which at least one man scaled a security fence to in an attempt to gain entry to the palace. One man was arrested for burglary, trespassing and criminal damage, police officials confirmed.
One of the two men was found inside the palace in an area open to the public during the day, according to the police. The second man was arrested for alleged conspiracy to commit burglary. No members of the royal family were at the London residence during the incident.
The incident has prompted a review of security at Buckingham Palace, the best known of Queen Elizabeth's II's palaces. It's not the first time an intruder has managed to get into the central London palace.
In 1982, Michael Fagan was arrested in the queen's bedroom after gaining access to the building via a drainpipe. According to news reports at that time, the queen woke to find him by her bed and talked with him until she was able to raise the alarm.
That incident led to promises of tighter security at the palace. Other incidents have occurred since, but none has involved anyone as getting as close to the queen as Figan did. In 2004, a fathers' rights campaigner dressed as Batman evaded security to stage a protest on a Buckingham Palace balcony.
Jason Hatch, a Fathers 4 Justice campaigner, used a ladder to scale the perimeter fence before climbing onto the balcony, where the royals appear on ceremonial occasions such as the wedding of Prince William and Catherine in 2011.