Authorities in Mexico City said early Friday that at least 25 people had been killed and another 100 injured by the explosion Thursday afternoon at the headquarters of Pemex, Mexico's state-owned oil company.
Both figures are up from where the story stood Thursday night (it was being reported then that there were at least 14 dead and 80 injured), when we were following the news as it came in from Mexico City.
There's a chance the grim figures will shift again in coming hours. According to The Associated Press, rescuers continue to search for victims who might trapped in the debris. The explosion reportedly caused extensive damage to the 51-story building's first few floors. It also shattered many windows on upper floors.
As NPR's Carrie Kahn tells our Newscast Desk, the cause of the explosion hasn't yet been determined.