US states to sue Trump administration over 3-D printed guns
AR-15 (M4A1) (Shutterstock)

A group of U.S. states on Monday said it is suing the administration of U.S. President Donald Trump for allowing the public to download blueprints for 3-D printable guns.

The lawsuit, announced at a news conference in Seattle, is a last-ditch effort by nine states including Washington, New York and Pennsylvania, to block the online dissemination of the designs before they are expected to become available later this week.

Reporting by Tina Bellon; editing by Grant McCool