NEW : The killed includes one seriously ; one critically injured . The National Transportation Safety Board will lead a probe into the crash , Gregor said . Collision sets fire to an area near Arizona 's Regional Medical Center . ` ` We ' ve got lots of heaps of metal to get through , '' fire captain says .
NEW : The killed includes one seriously ; one critically injured . Collision sets fire to an area near Arizona 's Regional Medical Center . ` ` We ' ve got lots of heaps of metal to get through , '' fire captain says .