Sean walking with a prosthetic limb for the first time

A US Navy sailor who has been documenting his recovery online after having his leg amputated has said he is on "top of the world" after taking his first steps using a prosthetic limb.

Sean Dougherty filmed the "game-changing" moment at the Walter Reed Medical Centre in Maryland.

Posting on his Instagram account, Sean wrote: "It's not much but my first few steps are now out of the way. With a little practice, I'll be back to my old self in no time."

He told BBC News: "Standing on two feet again, I feel like myself again. I feel like I've regained that part of my life."