A U.S. Coast Guard lieutenant living in Silver Spring, Md., was arrested after federal authorities said they found guns and ammunition, along with a hit list of Democratic legislators, activists and news anchors.

Lt. Christopher Paul Hasson, a self-described white nationalist, was arrested last week on gun and drug charges. But according to widespread media reports late Wednesday, prosecutors said in court filings that those charges just the start, and they accused him of being a domestic terrorist "bent on committing acts dangerous to human life that are intended to affect governmental conduct."

A report from NBCNews.com, citing court documents, described Hasson as having expressed extremist views for years, and said he has read the manifesto of Anders Breivik, the white supremacist Norwegian terrorist who shot and killed 77 people in 2011.

The report said court documents show that for two years starting in January 2017, "the defendant conducted online searches and made thousands of visits for pro-Russian, neo-fascist, and neo-Nazi literature."

He wrote in a draft email alleged to been found on his computer, federal prosecutors said, "I am dreaming of a way to kill almost every last person on the earth. I think a plague would be most successful but how do I acquire the needed/ Spanish flu, botulism, anthrax not sure yet but will find something."

The Coast Guard flagged Hasson because of Internet searches of extremist web sites at work, a federal law enforcement officer told NBC News.