Two explosions at the finish line of the Boston Marathon have killed at least two people and injured at least 100 others. There was also a fire started in the electrical room at nearby JFK Memorial Library, too, but the library is tweeting that the incident is not connected to the marathon blasts.

The FAA has imposed a no-fly zone over the bomb areas. There were reports that cell phone service in the city had been shut down, reportedly to prevent the use of the device to trigger other bombs, but the New York Times reports that the cell phone companies said they had not received any such request.

Chilling video by a Boston Marathon reporters shows the chaos of the moments right after the first blast. The New York Times’ The Lede Blog has comprehensive minute-to-minute coverage.

— Sara Lin