Frightening wreck knocks Scott Dixon out of Indianapolis 500

Pole sitter Scott Dixon walked away uninjured after a ferocious crash that saw his vehicle get airborne and slam cockpit-first into the inside Turn 1 wall and catchfence during Sunday's Indianapolis 500 at Indianapolis Motor Speedway.

Dixon's vehicle was thrown into the air and landed on top of the wall before disintergrating. IndyCar confirmed over Twitter that both Howard and Dixon were checked and cleared after the crash. Howard was not hurt.

Scott Dixon's auto is airborne after a collision with Jay Howard. Dixon did an interview and said: "Just a little beaten up". He had started on pole position after qualifying fastest with an average four lap speed of 373.63kmh.

Fernando Alonso, the two-time Formula One champion racing in his first Indy 500, was leading the race when the crash occurred. "To say I'm unhappy is an understatement". Meanwhile, a photographer standing behind the catch fencing was treated by track safety workers.

"It's tough", Dixon said. I already had picked that way to go. "I was just doing what I could to try to make up laps, salvage the race, pick up some yellows".

"I'm glad everyone is ok - it was a wild ride for sure. You just hold on and believe in the safety progress we've had over the last many years".