The man accused of stabbing a 14-year-boy to death in east London had “a clear intention to kill a number of people,” a jury has heard.

Marcus Monzo, 37, denies murdering Daniel Anjorin as the schoolboy left his home and walked to school in Hainault on 30 April last year.

The defendant is also accused of hurting five other people who were seriously injured during the 20-minute attack. He denies a total of eight charges, including four counts of attempted murder.

On the first day of the trial at the Old Bailey, the jury heard Daniel had suffered a “devastating and unsurvivable injury to his face.”

Opening the prosecution’s case, prosecutor Tom Little KC said Daniel did not know Mr Monzo.

“He had left home and was just walking to school, minding his own business, looking forward to the day ahead when he was killed by the defendant.

“His life was snuffed out in an instant.”

Mr Little told the court Mr Monzo’s behaviour was triggered “by self-induced intoxication in the form of drugs” which led to a psychotic disorder.

He added the defence case was that the defendant was “most likely suffering from a pre-existing condition which created a vulnerability to experiencing psychotic episodes with schizophrenia-like symptoms, prompted by his use of cannabis”.

Mr Monzo also denies wounding with intent, aggravated burglary and possession of an offensive weapon relating to a kitchen knife.

The trial continues.