An explosion has gone off near the finish line at the Boston Marathon.
A number of users on Twitter have tweeted photos showing smoke and people with serious injuries. Other photos show people fleeing from the Copley Square area in downtown Boston. The headquarters of the race is currently on lockdown, Reuters is reporting.
A livefeed from a local CBS station show numerous police vehicles on the scene.
The cause of the explosion is unknown at this time.We will be updating our liveblog as more details become available.
Article Courtesy of The Huffington Post
Picture Courtesy of CBS and The Huffington Post