Investigators said the death of Paul Walker, 40, and Roger Rodas', 38, on Nov. 30 may not have been a result of a drag racing incident.

"Tire skid marks on the asphalt near the crash site, which indicate a car was doing doughnut spins, also are being looked at," Los Angeles County Sheriff's Sgt. Richard Cohen told CNN. "It has not been concluded that they are related to the Walker wreck."

According to the Associated Press, no eyewitness corroborating the reports of a second vehicle has come forward. The Los Angeles County Sheriff's office is reportedly not looking for a second car at this time.

Both Walker and his friend died on Saturday after Rodas' 2005 Porsche Carrera GT slammed into a pole, causing the car to burst into flames. The two friends were reportedly just going on a "joy ride" before heading off to a Reach Out Worldwide charity event.

"It's well-known out here that that's a hot spot for street racers," California Highway Patrol Sgt. Rick Miler told AP about the scene of the crash.

Authorities are not revealing specific details about the crash at this time. The accident is currently under investigation. The autopsy of Walker is reportedly underway.

Fans, friends and loved ones of Walker took to social media to offer their condolences, including fellow "Fast & Furious" cast member Tyrese Gibson.

"My heart hurts it's broken no one can convince me that this is real.... Prayer warriors please pray real hard for his only child, his daughter and family...My God... My God... I can't believe I'm writing this," Gibson wrote on his official Facebook account.

Walker's on-and-off screen pal Vin Diesel took to his Facebook account to write a message for Walker.

"Pablo, I wish you could see the world right now... and the profound impact, your full life has had on it, on Us... on me...," Diesel wrote. "I will always love you Brian, as the brother you were... on and off screen."