Facebook boss Mark Zuckerberg has outlined plans to bring internet access, and the company's social network, to the developing world.

Speaking at Mobile World Congress in Barcelona, he said a "set of basic services" should be available to all.

Facebook is a member of Internet.org, a project launched last year that aims to put billions more people online.

One analyst told the BBC that Facebook's plans "can be seen from a completely commercial viewpoint".

Mr Zuckerberg said that once Facebook reached a billion users in 2012, the social network began to look at ways to engage more users around the world.

In his first ever appearance at Mobile World Congress, Mr Zuckerberg unveiled a set of projects in which Facebook, alongside Internet.org partners, will work on delivering internet access to emerging markets.

"Most people in the world don't have any internet access at all," he told the audience, adding that the "dramatic changes" to the industry were necessary for this to change.