It happened around 2:45 p.m. outside Marathon Sports on Boylston Street, according to WBZ-TV’s Lisa Hughes, who was near the scene covering the marathon.
There were two “incredibly powerful explosions just seconds apart,” according to Hughes.
Some people were reportedly missing limbs. Others had blood on their heads.
“There’s a lot of blood” at the scene, according to WBZ-TV producer Ken Tucci, who reported seeing more than ten people taken away from the scene on stretchers.
Cheryl Fiandaca, the public information bureau chief with the Boston Police Department, wrote Monday evening on Twitter that "[the] JFK incident appears to be fire related.
Earlier in the day, a spokesperson for the Boston Police Department told TPM that an explosive device had gone off at the library. No injuries were reported.
Corbin Johnson, a 19-year-old student at Berklee College of Music, told the Boston University Free Press that spectators didn't immediately understand that they were under attack before chaos broke out: “People stopped for a minute wondering if that really blew up and then another thing continuously blew up, so people thought it was going to be a chain effect,” he said.
”So everyone started running it was a lot of chaos and a lot of people started stampeeding on each other. We went to a hotel and from there, people were still stampeding and falling over each other.
Peole were crying and looking for their children. They made everyone run forward away from it, but people weren’t listening because they were trying to find their loved ones.”
