Sen. Lindsey Graham’s unexpected death on Saturday night fueled baseless speculation on social media that his passing was the result of a criminal action.

Among the onslaught were posts that falsely accused foreign powers, including Russia, Iran, Ukraine and Israel, of assassinating the South Carolina Republican. Others touched on broader conspiracy theories saying his travel schedule made it impossible for him to have died in Washington, or alleged that the FBI’s assistance of local authorities is proof of foul play.