President Obama's statement on the deadly DC metro crash

President Obama put out this written statement Monday evening on the DC metro crash that has killed at least four and injured dozens of others:

"Michelle and I were saddened by the terrible accident in Northeast Washington D.C. today. Our thoughts and prayers go out to the families and friends affected by this tragedy. I want to thank the brave first responders who arrived immediately to save lives. My staff has been in touch with Mayor Fenty's office and will continue to monitor the situation."