17-year-old arrested yesterday has been released on bail

Islington Gazette: Floral tributes are left on Caledonian Road where teenage cyclist Alan Cartwright was stabbed to death on Friday last week. Photo: Daniel Leal-Olivas/PAFloral tributes are left on Caledonian Road where teenage cyclist Alan Cartwright was stabbed to death on Friday last week. Photo: Daniel Leal-Olivas/PA (Image: PA Wire/Press Association Images)

A fourth suspect has been arrested on suspicion murder relating to the death of a 15-year-old boy in Islington on Friday.

The 18-year-old was taken into custody after attending a North London police station at about 6.15am today.

Alan Cartwirght, 15, was knifed while cycling along Caledonian Road, with friends at about 7pm on Friday.

He managed to continue cycling a short distance after the callous attack but soon collapsed and was pronounced dead at the scene later.

Islington Gazette: Emily Thornberry MP called the attack senseless and barbaricEmily Thornberry MP called the attack senseless and barbaric (Image: Archant)

Two men, aged 18 and 21, were arrested on suspicion of murder yesterday and were still in custody this morning.

Police also arrested a 17-year-old boy on suspicion of murder in the early hours of yesterday and have released the teenager on bail until a date in mid-April.

Yesterday afternoon MP for Islington South Emily Thornberry urged anyone with information who has not yet come forward to do so,

She said: “This horrific crime has shaken the entire community and it is imperative that the perpetrators be brought to justice as soon as possible.

“We all hold our children a little closer when such senseless tragedies happen.

“There are people in the local community – parents as well as children – who know what happened. They must come forward for the sake of Alan’s family and for the sake of us all.

“We must stick together and totally reject this senseless, barbaric violence.”