Iran calls accusations of plot to kill Trump 'unsubstantiated and malicious'

Accusations that Iran plotted to have former President Trump killed are "unsubstantiated and malicious," Iran's Permanent Mission to the United Nations told Fox News

Digital.Authorities received intelligence in recent weeks from a human source regarding an Iranian plot to kill Trump, which prompted an increase in U.S. Secret Service protection, federal law enforcement sources told Fox News. 

The plot doesn't appear to be connected to Thomas Matthew Crooks, 20, the gunman who shot Trump during his campaign rally in Butler, Pennsylvania, over the weekend, the sources said. 

The Secret Service increased its protection detail assigned to Trump because of the intelligence. The agency had grown concerned about the former president holding outdoor events and expressed its concerns to the Trump campaign.