It's the shocking tragedy that has convulsed America and the wider world - the worst gun massacre yet committed in the United States.

Details are still emerging about the murder of some 50 people at the Pulse LGBT nightclub in Orlando, Florida, by gunman Omar Mateen (29), and the brutal hate crime has led to an outpouring of shock, grief, anger, fear, and love over the past 24 hours. Here are some of the most powerful, emotional, and thought-provoking reactions from Twitter. 1) https://twitter.com/DPJHodges/status/611943312401002496 2) https://twitter.com/THR/status/742145115418853376 3) https://twitter.com/jerameykraatz/status/742021630105264128 4) https://twitter.com/steenfox/status/742050348550868992 5) https://twitter.com/b2dac/status/742060188648284160 6) https://twitter.com/Raphaelite_Girl/status/741963676094234624 7) https://twitter.com/harinef/status/742012750868680704 8) https://twitter.com/elielcruz/status/742078495233310721 9) https://twitter.com/gersandelf/status/742008212409327616 10) https://twitter.com/Ankaman616/status/742006461115555840 11) https://twitter.com/kiaspeaks/status/742001535345950720 12) https://twitter.com/jeonwonwwoo/status/742029600243355649 13) https://twitter.com/hanifleylabi/status/742129845577076736 14) https://twitter.com/wilw/status/742084037053800448 15) https://twitter.com/Tweet_Dec/status/742288379958722560 16) https://twitter.com/KieseLaymon/status/742020344203075584 17) https://twitter.com/RheaButcher/status/742013077504200704 18) https://twitter.com/ClaudiaKoerner/status/742073788880195585 19) https://twitter.com/Tweet_Dec/status/742260634893570048 20) https://twitter.com/TUSK81/status/742033388769419265 21) https://twitter.com/JamesMelville/status/742014055985090560 22) https://twitter.com/jk_rowling/status/742224187369107456 23) https://twitter.com/JamilSmith/status/742047875484549120 24) https://twitter.com/BobbyBigWheel/status/742005327168671744 25) https://twitter.com/Hajabeg/status/742023266936590337 26) https://twitter.com/rachel_is_here/status/742004660928647168 27) https://twitter.com/cschleichsrun/status/741982582531723265 28) https://twitter.com/DavidKlion/status/741981530952769536