Zayn Malik is postponing part of his sold-out tour following the death of his One Direction bandmate Liam Payne. The singer was set to kickoff the U.S. leg of his "Stairway to the Sky Tour" next week in California. Malik made the announcement Saturday on his social media accounts.

Ex-One Direction singer Liam Payne died Wednesday after falling from a hotel balcony in Buenos Aires. Here's what we know — and don't know — about the star's untimely death.