New York City Mayor Bill de Blasio said this week that a 14-minute delay in the dispatching of city ambulances to a Queens fire that claimed the lives of two children is "not acceptable."

An ambulance was dispatched at 12:05 a.m. early Sunday after an initial 911 call came in at 11:51 p.m. late Saturday on April 19. Fire officials have said the ambulance should have been dispatched at 11:57 p.m.

"If we have to make some changes, we'll make some changes because when we do this work we have to know that each and every time the ambulance will get there as quickly as humanly possible," de Blasio said, reports the Associated Press.