[Update 8:14 p.m.] At least 14 people were killed and 80 were injured in an explosion at the offices of Mexico's state-run oil company Thursday, the country's interior minister said.

[Update 6:50 p.m. ET] Citing the Mexico City district governor, Mexican CNN affiliate FOROtv is reporting five dead, 75 injured, 30 trapped after an explosion at the Pemex oil company offices in Mexico City.

[Original post] Injuries were reported after an explosion at the administrative offices of Mexico's state-run Pemex oil company in Mexico City on Thursday, the company said in a Twitter post.

The blast injured workers and prompted an evacuation of personnel, a company spokesman told Mexico's state-run Notimex news agency.