The Security Guards' Band performing on the Sao Paulo underground
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Brazil's singing security guards

A group of security guards in Sao Paulo are wowing commuters with monthly gigs in the underground stations they patrol.

A group of security guards on the Sao Paulo underground system in Brazil have formed a band which performs once a month for commuters in stations.

The nine members of the The Security Guards' Band rehearse and perform in their spare time.

The underground's management allows them to use stations as venues for their performances, claiming the initiative makes the guards happier employees and creates a closer bond between them and the passengers.

BBC Brasil's Jefferson Puff reports.