Media playback is unsupported on your device

Mexico City explosion: 32 people dead over 100 injured

1 February 2013 Last updated at 16:43 GMT

At least 32 people have been killed and another 100 injured in Mexico City after a blast at the headquarters of state oil company Pemex.

Around 30 people were reportedly trapped inside the building after the explosion.

Rescuers have worked through the night to try to find any more survivors.

There has been no official explanation for the cause of the blast.

Will Grant reports.