President Barack Obama has spoken out against the potential dangers of posting personal content on social networking sites.

Answering a question put to him from a group of teens, about how to go about becoming president, Obama said:

"Well, let me give you some very practical tips. First of all, I want everybody here to be careful about what you post on Facebook, because in the YouTube age, whatever you do, it will be pulled up again later somewhere in your life".

"And when you're young, you make mistakes and you do some stupid stuff. And I've been hearing a lot about young people who - you know, they're posting stuff on Facebook, and then suddenly they go apply for a job and somebody has done a search".

President Obama's tech-savvy White House administration uses Facebook, Twitter and YouTube.