Dan Wheldon's Indy fans on Monday began leaving tributes for the 33-year-old two-time Indianapolis 500 winner.

Flowers and cards have already been left at the gate to Indianapolis Motor Speedway, where Wheldon made his two Indy 500 wins and a memorial has also set up outside of his St. Petersburg, Fla. home, according to KTNV. Fans are also paying tribute to Wheldon on Facebook and other social media platforms.

IndyCars reportedly created the Web site www.danwheldonmemorial.com to honor him in pictures and articles.

Wheldon died on Sunday after a 15-car crash on the track at Las Vegas Motor Speedway. He was airlifted from the track after the accident happened and pronounced dead at University Medical Center shortly before 2 p.m. on Sunday. Three other drivers were also injured and expected to make a full recovery.

Those drivers are Will Power, who was released from hospital on Sunday, JR Hildebrand and Pippa Mann, who were release on Monday morning.

Autopsy results showed that Wheldon died of blunt head trauma. Wheldon survived by his wife Susie and their two young sons Sebastian, 2, and Oliver who was born last March.

When you talked to him, he always made time for anybody, Sharon Smith, a fan of Wheldon told KTNV. He was very friendly, especially to all the kids.

Watch a video of the crash below.