Reaction to Boston Marathon tragedy

Two explosions rocked the Boston Marathon on Tuesday and multiple injuries have been reported. Our thoughts and prayers are with the victims of this tragedy as more details continue to unfold. What follows is a roundup of social media coverage. Some include images that could be disturbing.
Second explosion going off @ Coply Square. #marathonmonday @ universalhub twitter.com/Boston_to_a_T/…
— Boston to a T (@Boston_to_a_T) April 15, 2013
boston marathon explosion twitter.com/GlobeDavidLRya…
— David L. Ryan (@GlobeDavidLRyan) April 15, 2013
Photo seconds after the blast: twitter.com/climatebrad/st…
— Don Van Natta Jr. (@DVNJr) April 15, 2013
Dozens of ambulances staged near Copley square. twitter.com/petersagal/sta…
— Peter Sagal (@petersagal) April 15, 2013
BostonPolice looking for video of the finish line #tweetfromthebeat via @ cherylfiandaca
— Boston Police Dept. (@Boston_Police) April 15, 2013
RT @ kqednews: We just spoke to a Berkeley woman in Boston - people in Boston can receive cell phone calls better than they can make calls.
— KQED (@KQED) April 15, 2013
Our thoughts and prayers are with everyone affected by the explosions at the Boston Marathon. #prayforboston
— Boston Red Sox (@RedSox) April 15, 2013
Praying for those effected by the explosions at the marathon. #Godblessboston
— Jacoby Ellsbury (@JacobyEllsbury) April 15, 2013
Runners blocked off #bostonmarathon twitter.com/Kevin_J_Donova…
— Kevin J Donovan (@Kevin_J_Donovan) April 15, 2013
Victims with lost limbs wheeled from scene. #wcvb
— Sean Kelly (@SeanKellyTV) April 15, 2013
Praying for those effected by the explosions at the marathon. #Godblessboston
— Jacoby Ellsbury (@JacobyEllsbury) April 15, 2013
Monitoring the scene back home. My thoughts and prayers are with the injured and everyone at @ bostonmarathon, in Boston and in Mass. -MC
— William Mo Cowan (@SenMoCowan) April 15, 2013We were so close it was scary. Felt the force of the explosion. People were fleeing and victims were scattered. twitter.com/JackieBrunoNEC…
— Jackie Bruno (@JackieBrunoNECN) April 15, 2013
Just walked home safe after watching #Boston marathon. Emergency response remarkably efficient after explosions.
— Husain Haqqani (@husainhaqqani) April 15, 2013
Wow. What is wrong with people. #prayers #bostonmarathon
— Will Middlebrooks (@middlebrooks) April 15, 2013