FIRE ORIGINATED FROM ENGINE AREA. WE WERE PULLED OVER BY ANOTHER DRIVER WHO SAW FLAMES UNDER THE MINI-VAN. AS I (DRIVER) EXITED AUTO, I WAS HIT BY EXPLOSIVE FLAMES THAT ORIGINATED FROM ENGINE EXITING BEHIND THE LEFT FRONT TIRE. FLAMES ALSO EMITTED FROM PASSENGER FRONT (RT) SIDE.DRIVER AND FRONT PASSENGER RECEIVED 2ND AND 1ST DEGREE BURNS. AUTO WAS ENGULFED IN FLAMES WITHIN 5 MINUTES. TOTAL LOSS. INSURANCE COMPANY INVESTIGATED - PRELIMINARY CONCLUSION FUEL LEAKAGE. *AK