Media playback is unsupported on your device

Colombian clubs' 'safe drugs' tests

15 December 2013 Last updated at 02:44 GMT

A voluntary drug-testing service at some of Colombia's nightclubs is aiming to reduce the risk to revellers from impure substances.

The free service, run by an NGO, uses a portable lab and chemicals to test samples of drugs for any "dangerous adulterants".

Arturo Wallace reports from Bogota.