A federal judge in Seattle on Monday blocked the State Department from allowing a Texas-based pro-gun group to post online plans for making untraceable 3D guns.

The details: The preliminary injunction comes after attorneys general from 19 states and Washington, D.C., filed a suit against the State Department, arguing that untraceable 3D printed guns pose a threat to national security and could be acquired by criminals and terrorists. Judge Robert Lasnik agreed, saying it would also have domestic repercussions. Meanwhile, Attorney General Jeff Sessions recently said his agency will "vigorously" prosecute the makers of 3D-printed guns.