Police in Arlington, Mass., have seized a "large amount" of weapons and ammunition from a comics retailer who last week sparked controversy with his comments about the Tuscon shooting that left six people dead and 13 others, including a U.S. Congresswoman, wounded.

The Boston Globe reports that Arlington police suspended the firearms license of Heavy Ink president Travis Corcoran on the grounds of "suitability" pending the results of an investigation whether comments he made in a blog post titled “1 down, 534 to go” were intended as a threat. (There are 535 members of Congress.)

Corcoran surrendered his weapons and ammunition to police at his home on Thursday. He has not been charged with a crime. According to The Arlington Advocate, Corcoran has a 90-day window in which to appeal his license suspension.

The 39-year-old, who describes himself as an “anarcho-capitalist,” had written that, "It is absolutely, absolutely unacceptable to shoot 'indiscriminately.' Target only politicians and their staff, and leave regular citizens alone." Following online outcry, Corcoran elaborated on his political beliefs in another post, explaining that "I dislike Representatives and Senators, and I think that each and every one of them is doing grave harm to the United States, and to the freedoms of the citizens of the US." He has since taken his blog offline.

The Globe reports that police consider the threat to be credible until proved otherwise. Federal law enforcement agencies have been notified of Corcoran's comments.