You can search the status of a runner on the BAA website: www.baa.org
Here’s one view of the explosion at the Boston Marathon. Real information about what actually happened is still difficult to find. There was a possible third explosion, one that reportedly may have been a controlled detonation of a suspicious package. If you find viable news about what’s going on, please add the links in the comments section below. Many are trying to find out what’s going on with their family and friends, please be considerate of that.