NASCAR tells drivers to stay in cars in wake of fatal weekend crash

The most widely followed motorsports organisation in the United States said it would require drivers involved in accidents to must remain in their car unless it unsafe to do so due to fire or smoke.

Stewart, 43, struck Kevin Ward, Jr., 20, during a dirt track race last Saturday in upstate New York after Ward left his car and pointed at Stewart while standing in the middle of the track.

"As we've demonstrated though in our history, we're willing to react quickly to different incidents," Robin Pemberton NASCAR's vice president of competition and racing development, told reporters at Michigan International Speedway in Brooklyn, Michigan.

"And it's not just NASCAR, it's about all of sports and all of motorsports we take note of."

(Reporting By Steve Ginsburg; Editing by Scott Malone and Susan Heavey)