Mexico City quake drill
Media playback is unsupported on your device

Millions practise Mexico City quake drill

21 September 2010 Last updated at 05:20 BST

Millions of people in Mexico City have been taking part in a large-scale earthquake drill.

On Sunday, people had marked the 25th anniversary of the 1985 quake that killed some 10,000 people.

The BBC's Sebastian Usher reports.