It comes as international footballers join a campaign warning fans travelling to the tournament not to exploit children.

On the backstreets of Recife, in northeastern Brazil, we met a group of children aged between 12 and 17 who were sniffing glue. Some of the children were involved in prostitution.

Iraquetan Gomes de Oliveira, who described himself as the street owner, told Sky News: “They sell their bodies.

“They go to nightclubs and places they know people sell themselves, but also people come here and take them and pay for sex.”

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