Kul Hawadleh was pronounced dead at the scene
The family of a teenager stabbed to death at a petrol station have described him as a "ray of light".
Kul Hawadleh, 19, had been attacked by a group of men at a Total petrol station forecourt in Wealdstone, north-west London, on 19 February.
He was treated for a stab wound to the chest by paramedics but pronounced dead at the scene.
Four people, including a teenage girl, have been arrested in connection with the killing.
In a statement, his family said: "His birth name was Kul, but at home we called him Hassan-Nur (Nur meaning light).
"He was just that, a ray of light to us. He was loveable, witty and bright."
The statement added: "On 12 March, he would have been celebrating his 20th birthday. I'm sure he would have been looking forward to it.
"But for us, that will now be a difficult day.
"It's very difficult for us to come to terms with Hassan's death.
"We cannot begin to describe how we feel. All his dreams and all our expectations of the bright future that lay ahead of him have been shattered.
"Those that have taken his life have robbed us of his presence, but they will never take away his smile and his love."
A man in his early 20s has been arrested on suspicion of murder and a girl, believed to be 17, on suspicion of assisting an offender. They are being questioned by police.
Two other men aged 20 and 22, arrested in connection with the stabbing, have been released on police bail.