Witnesses have reported that two explosions were heard near the finish line of the Boston Marathon on Monday, according to NBC News.
Will Ritter, the spokesman for a Massachusetts Senate candidate, said that he heard what sounded like two explosions and saw smoke rising near the Boston Public Library. He said that he saw three fire engines and police running to the site.
Ritter said that people hit the ground.
Janet Wu, a reporter for NBC affiliate WHDH, told NBC News that she heard two loud explosions, according to the report.
Boston police confirmed there was an incident but did not immediately give details. Police, fire and medical technicians were responding. New England Cable News reported that the emergency response came within seconds, according to the report.
Federal authorities told NBC News that they had no immediate information.