Buckingham Palace was put on lockdown Friday after police say a man attacked officers with a knife, the Telegraph reports. The suspect was tackled by officers and arrested shortly after 8:30pm near the palace gates in London, with two officers suffering minor injuries in the scuffle. "I was walking toward The Mall and St. James's Park when I saw police rush down toward the palace in great numbers," 25-year-old Nicole Kyle tells the BBC. "All we were told was that there's been an incident." Tourists were removed from the area.
Police say it's unclear if the attack was terror-related. Early reports claimed the suspect had a sword or machete, but police only described the weapon as a knife. The injured officers were treated at the scene, and no other injuries were reported. The alleged attacker was arrested on suspicion of grievous bodily harm and assaulting a police officer, the Independent reports. The Queen is vacationing in Scotland and wasn't at Buckingham Palace at the time of the attack. The palace itself refuses to comment on security matters. (Read more knife attack stories.)