" DEVELOPING: Multiple casualties are reported after at least two explosions rocked the area near the finish line of the Boston Marathon, according to the Boston Herald.
Witnesses reportedly heard booms that sounded like two claps of thunder near the finish line inside the Fairmount Copley Plaza Hotel.
The explosions occurred just before 3 p.m. Video of the scene showed a number of emergency crews in the area tending to victims and blood on the ground near the finish line.
A photographer with Fox affiliate WFXT reported seeing a number of victims with lost limbs.
Competitors and race organizers were crying as they fled the chaos. Bloody spectators were being carried to the medical tent that had been set up to care for fatigued runners.
"There are a lot of people down," said one man....."