Tragedy struck the Unites States of America today as a heavily-armed assailant opened fire inside a packed Orland nightclub killing 50 people and wounding 53 others.

The suspect has since been identified as Omar Seddique Mateen of Port St. Lucie, Florida.

Authorities have stated that they are investigating the massacre as possible terrorism.

The brutal shooting is one of the largest mass killings in American history.

Here is how UFC fighters and officials reacted to the horrible news:

So sad. #PrayersForOrlando

— Chris Weidman (@chrisweidman) June 12, 2016

I see humans, but no humanity… pic.twitter.com/dj6GdK50H3

— U R I A H H A L L (@UriahHallMMA) June 12, 2016

Prayers for the friends and families of the 50 dead and the many injured in Orlando after the shooting at the nightclub.

— Rich Franklin (@RichFranklin) June 12, 2016

A tragic event, that shud NEVER happen. I reflect back to Ali's words, of the world being a better place, if we all just loved each other.

— Aljamain Sterling (@funkmasterMMA) June 12, 2016

We need to do a better job of trying to leave this world a better place, while we are here. I get very irate knowing this is our world today

— Aljamain Sterling (@funkmasterMMA) June 12, 2016

I can barely put into words the emotions I feel regarding the events that took place in Orlando. So incredibly sad and horrifying.

— Dave Sholler (@DaveSholler) June 12, 2016

pic.twitter.com/UT66CFTihA

— Paige VanZant (@paigevanzant) June 12, 2016

My heart goes out to all those affected by the mass shooting in Orlando last night. I have no words to express my sentiments. God Bless

— Tecia Torres (@TeciaTorres) June 12, 2016

These fanatics want one thing. The destruction of our way of life. They have no #tolerance and will take advantage of ours. #OrlandoShooting

— Tim Kennedy (@TimKennedyMMA) June 12, 2016

Really sad, horrifying situation in Orlando. Heartening to see long lines of Central Florida residents in line to give blood to the victims.

— Jon Anik (@Jon_Anik) June 12, 2016

A photo posted by Paige VanZant (@paigevanzantufc) on Jun 12, 2016 at 10:26am PDT

Estou indignado c/ o atentado terrorista em uma boate de Orlando. Independente de sua religião, opção sexual, raça ou posição social, TODOS merecem ser respeitados e amados, afinal, somos TODOS seres humanos. Orando pelas famílias das vítimas e por um mundo com mais amor e compaixão #teambelfort @familiabelfort // I am outraged with the terrorist attack in Orlando nightclub. Regardless of your religion, sexual option, race or social position, ALL deserve to be respected and loved, after all, we are ALL human beings. Praying for the families of the victims and a world with more love and compassion #teambelfort #belfortfamily

A photo posted by Vitor "The Phenom" Belfort (@vitorbelfort) on Jun 12, 2016 at 8:46am PDT

[ooyala code=”pndmF3MzE6sJ64YllwcZqQjNBohOgt3P” player_id=”bd214e34cfad476984102de4bf5e8da2″]