MEXICO CITY, Rajab 14, 1437, April 21, 2016, SPA -- An explosion rocked a major petrochemical facility of Mexican national oil company Pemex in the Gulf state of Veracruz on Wednesday, killing at least three people and injuring dozens more, senior officials said, according to Reuters. Luis Felipe Puente, head of federal emergency services, told Reuters that three people had died in the blast and as many as 45 were injured. The governor of Veracruz state, Javier Duarte, told local television that more than 60 people were injured. Pemex said the explosion, which sent a huge, dark plume of smoke billowing into the sky, occurred at the facility's chlorinate 3 plant near the port of Coatzacoalcos, one of the company's top oil export hubs. The cause was unclear. Local emergency officials said hundreds of people had been evacuated from the site. Television footage showed an initial burst of flames followed by a tower of thick smoke. A Pemex official said local oil exports were not affected by the blast. --SPA 03:44 LOCAL TIME 00:44 GMT www.spa.gov.sa/w