AKIPRESS.COM - At least 91 people were killed in central Mexico after a ruptured gasoline pipeline exploded Friday evening, Omar Fayad, governor of the State of Hidalgo, said Tuesday, CNN reports. 

The death toll has risen since Sunday, when officials said the explosion had killed 79 people and injured 66.

Fayad said some of the injured are minors who will receive treatment at Shriners Hospital for Children in Galveston, Texas.

Alejandro Gertz Manero, general prosecutor of Mexico, said Saturday night that the investigation has just started but that a "preliminary belief" is that static electricity from the clothing of people around the pipeline may have caused the blast.

He noted a large number of people were around the pipeline, some of whom were wearing clothes made with synthetic fibers that could "generate electric reactions."

He said no arrests have been made and that witnesses will be interviewed Sunday.

The fire resulting from the pipeline explosion has been extinguished, Mexican Secretary of Public Security Alfonso Durazo said on Twitter, and rescue teams have begun to recover bodies.

Residents in the immediate vicinity of the pipeline, which runs from the cities of Tuxpan to Tula, have been evacuated, State oil company Pemex said.