Truck was carrying more than 25 tons of dynamite . At least 140 people injured in the blast , including at least 10 children and 2 women who were killed instantly when they fell from a truck onto their heads while trying to escape the blast. No foul play suspected , spokesman says ; cause under investigation . The cause of the explosion is under investigation . Mexican news agency reports higher death toll of 30 .
Truck was carrying more than 25 tons of dynamite . At least 140 people injured in the blast , including at least 10 children and 2 women who were killed instantly when they fell from a truck onto their heads while trying to escape the blast. No foul play suspected , spokesman says ; cause under investigation . Mexican news agency reports higher death toll of 30 .