Two explosions occurred Monday in Massachusetts near the finish line of the Boston Marathon. Two people have been killed and nearly two dozen have been reported injured.

Some the initial pictures coming from the scene show fire from the explosion, smoke, injured victims and rescue teams. The site is under evacuation and investigation by authorities.

The Boston Marathon said that bombs caused the two explosions and that organizers were working with authorities to determine what happened. The Boston Police Department said two people were killed and 23 others injured. At the time, there are no reports as to who could have caused this.

This GIF posted on Vine shows the explosion and people being knocked over from it.

Here are some of the photos from the scene (Content Warning: some of the images below are graphic):

The following gallery includes photos that were taken of injured victims. Content Warning: Some of these images are extremely graphic:

This story has been updated with a blurred version of a photo due to its graphic nature.