NEW : It is Mexico 's second-most-powerful post . U.S. government sends investigative team to help . Death toll in Mexican plane crash rises to 13 , report says . Mexico 's interior minister and two high - ranking officials among those killed . Interior minister is country 's second most - powerful post .
NEW : U.S. government sends investigative team to help . Death toll in Mexican plane crash rises to 13 , report says . Mexico 's interior minister and two high - ranking officials among those killed . Interior minister is country 's second most - powerful post .