The death toll from an explosion at a petrochemical plant owned by chemicals company Mexichem SAB and state oil company Petróleos Mexicanos has risen to 13, Pemex Chief Executive José Antonio González Anaya said Thursday. The explosion Wednesday afternoon at the plant at Coatzacoalcos, in Veracruz state, also injured 136, of whom 88 remained hospitalized, Mr. González Anaya said in an interview on Mexico’s Televisa network. A number are in serious condition and the number of casualties could increase as work continues at the site, he added. The fire was under late Wednesday, and there was no danger to communities in the area, officials said. The plant produces vinyl chloride used for making PVC plastic. The apparent cause of the blast was a leak at the plant, where raw materials include chlorine and […]