DEVELOPING: Multiple casualties are reported after at least two explosions were heard near the finish line of the Boston Marathon, according to the Boston Herald.
Witnesses reportedly heard two 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.
"I saw two explosions. The first one was beyond the finish line. I heard a loud bang and I saw smoke rising," Boston Herald reporter Chris Cassidy, who was running in the marathon, told the newspaper. "I kept running and I heard behind me a loud bang. It looked like it was in a trash can or something...There are people who have been hit with debris, people with bloody foreheads.”
A photographer with Fox affiliate WFXT reported seeing a number of victims with lost limbs.