Blast rocks Mexican state-run oil company offices
Mexico City (CNN) -- Workers were injured in an explosion at the administrative offices of Mexico's state-run Pemex oil company in the country's capital Thursday, state media reported.
At least 30 people were trapped in the building after the blast, CNN affiliate Foro TV reported.
Citing local authorities, Foro TV said five people were killed, and 75 people were injured. CNN has not independently confirmed details about casualties from the explosion.
Mexico City explosion at Pemex, state oil giant
An explosion has rocked the headquarters of state oil company Pemex in Mexico City, leaving at least 22 people wounded, reports say.
"An explosion took place in the B2 building of the administrative centre," Pemex said in a message on Twitter.
"There are injuries and damage on the ground floor and mezzanine," it said. The cause of the blast is not known.
Last September, 30 people died in an explosion at a Pemex gas plant in northern Mexico.
Television pictures showed rubble from the blast spread out on to the street in front of the building, and Red Cross ambulances on the scene attending to the injured, the BBC's Will Grant reports from Mexico City.
File photo of the Pemex Executive Tower in Mexico City The 54-floor Pemex building is 214 metres (702 feet) tall
At this stage there is no official explanation for the explosion, our correspondent adds.
Explosion rocks Mexican oil giant Pemex offices, injures 20
(Reuters) - An explosion rocked the Mexico City headquarters of state oil giant Pemex on Thursday, killing one person, injuring more than 20 others and causing extensive damage to the building.
A local emergency official said one person had died in the blast and 22 others were injured. Another four people were trapped inside the skyscraper, the official said.
The blast, which media reports said was caused by machinery exploding, occurred in the basement, emergency officials said.
Pemex initially said the building had been evacuated because of a problem with its electricity supply. It then said there had been an explosion, but did not say what had caused it.