Mexico City explosion: 'Around 30 people trapped'
1 February 2013 Last updated at 04:22 GMT
At least 14 people have been killed and another 80 injured after a blast at the headquarters of state oil company Pemex in Mexico City.
Manuel Rueda is a news reporter for Mexican TV station Univision.
He told the BBC's Adnan Nawaz that office workers heard "a loud explosion", and that around 30 people were trapped in the building.