DETAILS: 4 dead, DOZENS injured in Canada military base fire

. >> Bill: WE SAW IT IN THE NEW. YORK PRIMARY. THANK YOU. >> Dana: THIS STORY IS TERRIBLY. SAD. FOUR SERVICE MEMBERS ARE DEAD. AND DOZENS INJURED AFTER A FAST. MOVING FIRE AND EXPLOSION DURING. MILITARY TRAINING IN ALBERTA, CANADA. PRELIMINARY INVESTIGATIONS. MUNITION FROM A LIVE TRAINING. EXERCISE SPARKED A FAST MOVING. GRASS FIRE. CB COTTON HAS MORE. >> CANADIAN PRIME MINISTER MARK. CARNEY CALLING THE FIRE ONE OF. THE MILITARY'S WORSE PEACETIME.

TRAGEDIES. GRASS FIRE BROKE OUT SATURDAY AT. WAINWRIGHT. INVESTIGATORS ARE TRYING TO LOOK. AT HOW THE FLAMES TOOK OVER THE. SOLDIERS. THEY THOUGHT THEY COULD CONTINUE. TRAINING. THE CAUSE OF THE FIRE IS UNDER. INVESTIGATION. DURING A SUNDAY NEWS CONFERENCE. OFFICIALS SAID THEY DON'T. BELIEVE IT WAS AN OIL OR GAS. EXPLOSION. INSTEAD SUGGESTING IT COULD HAVE. BEEN A VARIETY OF AMMUNITION OR. EXPLOSIVE WEAPONS THAT WERE USED.

DURING THE TRAINING. A COMMANDER OF THE CANADIAN. ARMED FORCES WHEN THE WINDS. SUDDENLY SHIFTED THE FLAMES WENT. RACING TOWARD SOLDIERS. >> I SPOKE TO MY COMMANDER LAST. NIGHT AND THIS MORNING. WITHIN 30 SECONDS TO A MINUTE. THEY SAW NO FIRE AND THEN THERE. WAS A FIRE RIGHT ON TOP OF THEM. WAS IT BECAUSE IT MOVED UNSEEN. THROUGH DIFFERENT TEAR RAIN? WE ARE GOING TO DO A COMPLETE. INVESTIGATION. >> OFFICIALS SAY FOUR SOLDIERS. WERE KILLED. DOZENS MORE INJURED AND 19 ARE.

IN CRITICAL CONDITION. SOME SUFFERING SEVERE BURNS THAT. COULD TAKE WEEKS OR MONTHS OF. TREATMENT. THE MOTHER OF ONE OF THE FALLEN. WRITING ON SOCIAL MEDIA QUOTE, IT IS WITH HEAVY HEARTS WE SHARE. THE NEWS OF OUR SON, SEAN, HAS. PASSED AWAY TO BE WITH OUR. HEAVENLY FATHER. LOVE YOU OUR DARLING CHILD. PEOPLE IN ALBERTA ARE SET TO.