Celebrities Tweet On Boston Marathon Explosion, Expressing Condolences To Those Affected In Boston

The world is reacting on the Twittersphere to yesterday's horrific explosion during the Boston Marathon and celebrities are among those expressing their sadness.

Two explosions went off near the finish line of the marathon, killing three and injuring dozens of others in a number that continues to climb. No arrests have been made as of press time.

In the aftermath of the tragedy, numerous celebrities have taken to the social media site to send their condolences to those in Boston.

Khloe Kardashian: So many unspeakable tragedies! My heart, love and prayers go out to anyone affected by the sad events in Boston. #PrayForBoston

Kim Kardashian: My heart is breaking for everyone effected or injured in the explosion at the Boston Marathon. God bless you all! My prayers are with you!

Simon Cowell: Watching the news. Horrendous. Please god no more bombs. Stay safe America.

Ke$ha: My heartfelt love goes out to those affected by today's tragedy in Boston. All of our thoughts are with you. #loveintothelight

Jesse Tyler Ferguson: ‏All my thoughts are with #Boston.

Lindsay Lohan: Sending prayers to everyone who was/is at the #bostonmarathon

Carson Daly: Praying for those hurt at #bostonmarathon - so terrible. 2 explosions at Finnish line. News is all over it. So sad

Olivia Wilde: Oh for f*cks sake. I'm so disturbed by the reports from Boston. This is horrible.

Pink: Our thoughts and prayers are with everyone affected by the explosions in Boston.

Anderson Cooper: Will be in Boston for tonight's broadcast

Eva Longoria: God be with the injured people! RT "@CNN: There has been at least one explosion near the Boston Marathon finish line https://say.ly/Oyb5Bfw

Nicki Minaj: My heart goes out to everyone who woke up this morning to enjoy a peaceful marathon but were met w/senseless destruction.

Channing Tatum: #prayforboston

Alicia Keys: Shaken... My thoughts and prayers are with the city of Boston and those affected by this tragedy.

Justin Timberlake: My thoughts and prayers are with everyone in the city of Boston and all of those affected by this terrible incident.

Kelly Osbourne: Praying for #Boston

Josh Duhamel: Thoughts & prayers go out to Boston. #prayforboston

Ellen DeGeneres: Let's all send our thoughts, our prayers and our energy to the people injured in Boston. My heart is with you.

Our thoughts and prayers go out to everyone in Boston during these tragic events.