Police have seized a Boston-area comic book dealer's arsenal and suspended his gun license over a blog post that suggested other members of Congress and their aides should be targeted in the wake of the shooting of Arizona Democratic Rep. Gabrielle Giffords.

In a post titled "1 down, 534 to go," Travis Corcoran of Arlington, Mass., wrote: "It is absolutely, absolutely unacceptable to shoot 'indiscriminately'. Target only politicians and their staff, and leave regular citizens alone." The blog, TJICistan, is no longer accessible, but affiliates have emerged.

"We certainly take this as a credible threat, and credible until we prove otherwise," said Arlington Police Capt. Robert Bongiorno. Officers confiscated a "large amount" of weapons and ammunition, he said, without offering specifics. A source told WBZ-TV 11 guns were taken.

Corcoran, 39, who runs the online comic site HeavyInk and calls himself an "anarcho-capitalist," has not been arrested or charged with any crime. Local and federal authorities are investigating.

After his post generated traffic and attention, he soft-pedaled his braggadocio in an interview with The Arlington Advocate, saying at one point, "Can you reform by shooting politicians? "I don't think you can."

But in a Twitter exchange recounted by the liberal blog ThinkProgress, Corcoran explains his anti-government philosophy and why and when political assassination may be legitimate.