This is a particularly tragic turn of events.
The sad news has sent the Lakers star to Twitter to express his condolences.
"My thoughts and prayers are with the young boys family," Odom tweeted late last night.
In town for a funeral, Odom had hired a driver and was chauffeured to a barbershop in his native Queens on Thursday when the accident occurred. The boy, Awsaf Islam, and the driver of the motorcycle were both taken to Elmhurst Hospital with serious injuries immediately following the crash.
"[Awsaf] passed Friday," hospital spokesman Dario Centorcelli tells E! News. "He was brought in late afternoon about 5:30 p.m. on Thursday. He was on a scooter and was hit by a motorcycle that was hit by another vehicle. He suffered serious head injuries."
A funeral was held for Islam on Monday afternoon, according to TMZ.
Lamar's wife, Khloé Kardashian Odom, tweeted a message seemingly aimed to console her husband: "Our love will give us strength! Love conquers ALL!"
Lamar and Khloé, who was not in the car with him, have been in New York following the death of Odom's cousin, who was killed last week.
Details have not been forthcoming on what exactly went down, but Khloé tweeted early today in response to supportive comments from fans: "My hubby and I are always protected by angels. Thank you 4keeping us filled with strength and LOVE. Tomorrow is never promised. Live 4today."
Apparently some of the commentary took a turn for the negative later on, because tonight she also wrote: "Stop judging other people's lives that u know NOTHING about! My husband&I r in NY 4a funeral 4 his fam. Senseless violence is disgusting!!
"A family member of his was killed and some of the comments you are saying due to the fact I am off twitter today are disgusting."