London (CNN)A British man has pleaded guilty to threatening to assassinate the late Queen Elizabeth II on Christmas Day 2021, police have said.
Jaswant Singh Chail, 21, pleaded guilty to three charges, including treason and possession of an offensive weapon, at a hearing at London's Old Bailey court on Friday following an investigation by the London Metropolitan Police Counter Terrorism Command.
Two officers spotted Chail within the grounds of Windsor Castle, where the Queen was staying at the time, at around 8:10 a.m. on December 25, 2021, wearing black clothes and a metal mask, according to a statement issued by the police force.
Chail, who appeared at the trial via videolink from Broadmoor high-security psychiatric hospital, was carrying a crossbow "loaded with a bolt, with the safety catch off and ready to fire." He told a police protection officer, "I am here to kill the Queen," before being arrested, the UK's PA Media news agency reported.
This undated photo, released by the Crown Prosecution Service (CPS) on February 3, shows the crossbow that Chail was carrying when he was arrested.
Chail was thought to have scaled the perimeter of the grounds with a nylon rope ladder beforehand.
He is understood to have sent a video to about 20 people "claiming he was going to attempt to assassinate the Queen."
Chail was charged with the offenses on August 2, 2022 and is due to be sentenced at the Old Bailey on March 31, according to the Metropolitan Police statement.