Transcript for Deadly firework explosions just north of Mexico City

Time now for the index and we start with that deadly fireworks explosion north of Mexico City. Nineteen people killed in back to back blasts. At a fireworks facility the first explosion drawing first responders to the scene. Pending that second blast killing four firefighters and two police officers. At least forty people were also injured.

This transcript has been automatically generated and may not be 100% accurate.