Niall Horan has mourned One Direction bandmate Liam Payne in a heartfelt social media post, writing: "It just doesn't feel real."

The death of Liam Payne, a member of the internationally-renowned boy band One Direction, at 31 has sent a wave of grief worldwide.Payne was reported to have died after falling off a third-floor balcony of a Buenos Aires hotel Wednesday local time.