Boston Marathon finish in explosions

Twin explosions were recorded on Monday afternoon in the final line of the Boston Marathon. Two people have been killed and 23 injured after two explosions at the finish line of the Boston Marathon, police say. The explosions occur 200m apart. A system of response was activated.

Emergency services, first responders and FBI descended on the scene, which was quickly locked down.

The cause of the explosions has yet to be confirmed.
The images on the television show wounded people being carried on stretchers.