Four people are dead and three injured after an explosion at a fireworks factory in central Mexico.
The Public Safety Secretariat said in a communique on Friday the number of dead and injured could change.
The agency said a first explosion occurred at the factory on Thursday, in the town of Ejidos de Santa Maria y San Agustin, as workers were making fireworks.
However, there was a second blast later that encompassed the gunpowder storeroom and warehouse.
Authorities said two people were killed at the scene of the accident, another succumbed when taken to hospital for treatment, while a third died on Thursday night of the injuries suffered.
Another three people were badly burned.
"The causes of the explosions are still unknown and it will be up to the corresponding ministry authority to report on any progress made in the investigation into the incident," the communique said.
