Celebrities flock to Twitter to express their thoughts on the Boston tragedy.
A Boston Native : Donnie Wahlberg
No words to describe the pain in my heart, at this moment, in seeing my city torn apart this way. So sad. Please #pray4boston & the victims.
Let's all send our thoughts, our prayers and our energy to the people injured in Boston. My heart is with you.
#bostonmarathon "Reports of Marathon Runners that crossed finish line & continued to run to Mass General Hospital to give blood to victims"
So sad about the violence today in Boston at such a wonderful community tradition. Keeping all effected by today's tragedy in my thoughts
Joey McIntyre There was an explosion by the finish line about 5 minutes after I finished- I'm ok but I'm sure there are many hurt.
Dane Cook My prayers with everyone in Boston right now after this atrocious act of violence!!
Lance Armstrong Just off the bike and getting the news from the Boston marathon. Thoughts & prayers go out to Dave M, his staff, all runners, and volunteers
Arnold@Schwarzenegger My thoughts are with Boston. Thank you to the brave first responders who always run toward our greatest fears to save lives.
Eva Longoria@EvaLongoria God be with the injured people!
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!
Atlanta Braves@Braves3h #PrayforBoston
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