Less than a half-hour before the fatal car crash that killed Princess Diana and Dodi Fayed, Dodi's father urged his son to spend the night at the Ritz Hotel rather than face the paparazzi waiting outside, Mohamed Al Fayed said.

"Twenty minutes later, I got a call from one of my security guys at the hotel," Al Fayed told NBC's Katie Couric in an interview. "Shocking night."The interview is airing Tuesday night on "Dateline." NBC released a partial transcript Monday.

Diana, her boyfriend Dodi and driver Henri Paul, a Ritz employee, were killed in the Aug. 31 crash in a Paris tunnel, shortly after leaving the hotel. Paul was drunk at the time.

Al Fayed said he believes there was a conspiracy to kill Dodi and Diana because people didn't want to see an Egyptian stepfather for the future king.