There were two explosions today at the Boston Marathon. So far, there are reportedly three people dead and more than 100 people injured.

It is not known who, or what, caused the explosions, but Fox News contributor Erik Rush suggested on Twitter that people from Saudi Arabia were likely responsible and tweeted "kill them all" in response to a tweet about Muslims.

First, Rush tweeted: "Everybody do the National Security Ankle Grab! Let's bring more Saudis in without screening them! C'mon! #bostonmarathon."

Another Twitter user, Bill Schmatfeldt, who uses the handle "bloodonthemike," tweeted in response: "Sweet God. Are you ALREADY BLAMING MUSLIMS??"

Rush then tweeted: "Yes, they're evil. Let's kill them all."

That tweet has been taken down by Rush, but snapped a screenshot before it was removed.