"We worked with organisations including Samaritans to develop these tools, and one of the first things they told us was how much connecting with people who care can help those who are struggling to cope - whether offline or online," said Julie De Bailliencourt, head of safety at Facebook, in a blog post.

Facebook and Samaritans have collaborated on a suicide prevention feature since 2011.

If a person on Facebook thinks a friend is in need of support, then they can use a form in Facebook's Help Centre to flag their concern to Facebook or report their concern via the reporting links found across Facebook's site.

Reports to Facebook are triaged and those reported that where someone may be at risk are prioritised.

"If someone is reported to us, as at risk of suicide, Facebook's safety team will look at their account. If they consider that a person is at risk of immediate harm then we may, in very rare cases, alert local police," Samaritans wrote on its website.

>> Click here to read more news on Facebook