Police in London subdued a knife-wielding man on Wednesday morning outside Buckingham Palace, as Britain remains shaken from a deadly terror bombing.
The Telegraph reported the man was arrested on The Mall, a road leading to the royal residence, just as Queen Elizabeth II passed by in a car.
The Metropolitan Police said the incident happened about 10:40 AM, when patrolling officers searched the man on the Mall. Police took possession of the knife and the man, who was not identified, was arrested and taken to a London police station.
“The incident is not believed to be terror-related,” according to the agency.
The incident provided a scare to an already shaken Britain, where a suicide bomber killed 22 and injured 59 others at an Ariana Grande concert in the northern city of Manchester on Monday.
In the wake of the bombing, British security forces deployed 1,000 soldiers to key places throughout the country, including Buckingham Palace, to provide added security. The ceremonial changing of the guards outside Buckingham Palace, a London tourist attraction, was canceled Wednesday so officers can be sent elsewhere.
The security effort came after Prime Minister Theresa May upped the country’s terror threat level to critical, the highest it’s been in a decade.
The new threat level suggests another attack could happen as officials scramble to determine whether the concert bomber, 22-year-old Salman Abedi, acted alone. Four people have been arrested in connection with the blast.