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Senegal farmers helped by cattle tracker technology

25 July 2014 Last updated at 00:11 BST

Cattle rustling is a common feature of life in sub-Saharan Africa.

It is a crime that has a huge economic impact, but the human cost can be even higher.

In rural Senegal, a project to track cows using mobile phone technology and radio-frequency identification tags could help tackle the problem.

Fiona Graham went to find out how it worked.