Four young Islamic terrorists planned to assassinate Queen Elizabeth by stabbing her at the Royal British Legion Festival, a military party held in Royal Albert Hall. The event is scheduled on Saturday, November 8.

The Sun reports that the four extremists, aged 19 to 27, were arrested by British police on Thursday night. Besides a knife, the police found in their possession firearms. They were arrested on suspicions of committing, preparing or instigating acts of terrorism, according to the Metropolitan police.

Authorities informed the 88-year-old Queen about the assassination plot, but despite the threat to her life, she and Prime Minister David Cameron would still attend to her royal duties this weekend such as wreath-laying rites at the Sunday Remembrance celebration to mark the end of World War I in 1918.