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A teenage YouTuber has died along with two others after his McLaren ploughed into oncoming cars in an alleged suicide smash.

The online star, who called himself McSkillet, was reportedly driving faster than 100mph when his $200,000 sports car crashed head-on into an SUV, killing its driver and passenger, and erupting into a fireball.

Those killed in the Hyundai SUV were a 43-year-old San Diego woman and her 12-year-old daughter, the Medical Examiner’s Office said Friday.

The 18-year-old had made a fortune selling digital "skins" used to customise guns and knives in the first-person shooter video game Counter-Strike: Global Offensive (CS:GO).

But he was banned from an online marketplace for allegedly being involved in a skin gambling website called CS:GO Magic and had allegedly been suffering from mental health issues.

(Image: ABC10/Youtube)

It is claimed that his income suffered and he had lost access to hundreds of thousands of dollars after being banned.

The CS:GO community expressed shock, sadness and anger over his death, with fellow gamers describing him as the "king of skins".

In December, he posted a video on YouTube, where he had almost 900,000 subscribers, showing off his new McLaren.

One fellow trader told Mirror Online that McSkillet was "very private" and would not reveal his real name or other personal details.

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(Image: Youtube)

The trader said: "He was a super kind guy who knew what he was talking about.

"He genuinely seemed to care for everyone and he was probably one of the nicest all round people I’ve ever met."

McSkillet is said to have had a "skin" inventory estimated to be worth more than $100,000.

But his YouTube and Twitter activity came to an abrupt halt in February, and it later emerged that he had been "trade banned" from selling skins for his alleged involvement in "skins" a gambling website.

The fiery crash involved about eight cars on Interstate 805 in San Diego, California, just after 4.30pm on Thursday.

(Image: ABC10/Youtube)

It was travelling south in the northbound HOV lane at more than 100mph when it crashed into oncoming cars, the California Highway Patrol said.

The black McLaren slammed head-on into an SUV, killing the driver of the McLaren and the driver and passenger in the SUV.

One of the victims was thrown from a vehicle and died at the scene. A second victim died inside a car and a third died later.

Eight other people were injured.

(Image: Youtube)

The demolished McLaren - reduced to pieces of twisted metal - and at least one other car, an SUV, caught fire, sending a huge plume of smoke into the air.

A second SUV flipped onto its side.

About half an hour before the fatal crash, a black McLaren smashed through a fence at a primary school, Fox 5 reported.

The driver smashed a school window and then sped away in the sports car, said eyewitnesses.

(Image: ABC10/Youtube) (Image: ABC10/Youtube)

Alec Galloway said he was almost run down by the car, driven by a male who appeared to be in his teens, as it sped away.

Mr Galloway said: "I was worried he was going to hit the two people standing at the gate. "They stood in the middle trying to stop him doing hand motions but he didn't stop at all.

"If they didn't move they would've got run over... he didn't stop his car, he just kept accelerating and the gate busted open when he hit it."

Eyewitnesses reported a wrong-way driver speeding along the motorway shortly before the tragedy.

Hector Puga told NBC News that the crash happened in front of him.

(Image: Youtube)

He said: "That car in front of me swerved, slammed and exploded within a fraction of second all I could do was hold on to my steering wheel and run over everything that exploded."

A woman who witnessed the crash told 10 News : "It was like a scene from a movie. All the cars were stopping. There was smoke. Fire. Loud noise.

"As soon as I look up in front of me, that car other there was flying and tumbling down the freeway."

She said the driver of the flipped-over SUV crawled out and fellow survivors carried him to the motorway's shoulder, where he was later loaded into ambulance.

(Image: Youtube) (Image: ABC10/Youtube)

Police said that man survived with broken bones.

Tributes have been pouring in for the YouTube star with one friend writing on Twitter: "RIP to @OG_McSkillet.

"You truly were my best friend and biggest inspiration in life. I know you were dealing with an incredibly hard time but I know heaven will treat you well.

"I love you so much. Thank you for all the amazing times."

Another pal wrote: "Genuinely one of the nicest guys I’ve met since starting youtube, @OG_McSkillet THIS CANT BE REAL MAN."

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