A TEEN accused of plotting an ISIS-inspired terror attack on the day of a Justin Bieber concert researched security at the event.
The 17-year-old, who cannot be named because of his age, was arrested at his home in south Wales by police who found a claw hammer, kitchen knife and “martyrdom letter” in his school bag, a court was told.
Prosecutors alleged he had carried out web searches trying to find information two days before the show at Cardiff’s Principality Stadium on June 30.
Matthew Brook told the court detectives found a copy of a poster for the concert and searches such as “Justin Bieber Cardiff 2017” and “Justin Bieber Cardiff 2017”.
He said: “At 10.10pm there is this defendant searching ‘Justin Bieber Cardiff 2017’.
“As you are probably all aware, Justin Bieber is a well-known pop star and he was having a large concert in Cardiff on June 30, two days after this search.”
On June 29, the court heard, a media file was created on the defendant’s computer showing a poster for the concert at Cardiff’s Principality Stadium.
Jurors were told that the alleged terrorist also searched for “Justin Bieber Cardiff security” on June 29.
Mr Brook said of the search: “This defendant is interested in what the security will be for a large public event the following day.
“This is in context of course of all his searches, his threats on Instagram about Cardiff being attacked on the 30th, the knife and hammer in his bag, and of course the martyrdom letter as well.”
The teenager denies preparing to commit acts of terrorism and four other terror charges.
The trial at Birmingham Crown Court continues.