One international agency working with children estimates that each year, 40,000 to 70,000children are involved in trafficking, pornography or prostitution in Indonesia, a nation of 240million where many families remain impoverished.

Facebook says its investigators regularly review content on the site and work with authorities, including Interpol, to combat illegal activity.

"We take human trafficking very seriously and, while this behavior is not common on Facebook, a number of measures are in place to counter this activity," spokesman Andrew Noyes said in an e-mail.

About the broadcaster:

Emily Cheng is an editor at China Daily. She was born in Sydney, Australia and graduated from the University of Sydney with a degree in Media, English Literature and Politics. She has worked in the media industry since starting university and this is the third time she has settled abroad - she interned with a magazine in Hong Kong 2007 and studied at the University of Leeds in 2009.

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