Three people have been reported dead after two large explosions went off near the finish line of the famous Boston Marathon, leaving behind a scene of unimaginable carnage.

Eyewitnesses at the scene said there was a loud explosion and emergency vehicles crowded the scene. Up to 60 people have been reported injured, dozens of them seriously.

Witness Dave Weigel took to social media to describe the scene after the smoke cleared. ‘I saw people’s legs blown off. Horrific. Two explosions. Runners were coming in and saw unspeakable horror,’ he wrote on Twitter.

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. A man was pictured with his lower leg blown off.

'There are a lot of people down,' said one man, whose bib No. 17528 identified him as Frank Deruyter of North Carolina. He was not injured, but marathon workers were carrying one woman, who did not appear to be a runner, to the medical area as blood gushed from her leg.

A Boston police officer was wheeled from the course with a leg injury that was bleeding.

About three hours after the winners crossed the line, there was a loud explosion on the north side of Boylston Street, just before the photo bridge that marks the finish line. Another thunderous explosion could be heard a few seconds later.

Runner Laura McLean of Toronto told the Associated Press that she heard two explosions outside the medical tent.
'There are people who are really, really bloody,' McLean said. 'They were pulling them into the medical tent.'

Cherie Falgoust was waiting for her husband, who was running the race.

'I was expecting my husband any minute,' she said. 'I don't know what this building is ... it just blew. Just a big bomb, a loud boom, and then glass everywhere. Something hit my head. I don't know what it was. I just ducked.'

A spokesman for the Boston Marathon said that the race's headquarters are on lock down.

Train service on the green line between Kenmore and Park suspended, according to the MBTA.

Windows of Marathon sports store blown out by the force of the two blasts.

Read more: http://www.dailymail.co.uk/news/article-2309545/Boston-Marathon-explosion-Dozens-reported-injured-device-goes-near-finish-line.html