US President Joe Biden will shortly unveil his administration's first steps to curb gun violence, including a plan to reduce the proliferation of "ghost guns", after a slew of mass shootings put pressure on him to act.
Mr Biden will announce on Thursday US time the Justice Department intends to issue a proposed rule within 30 days to help reduce the increasing prevalence of untraceable, self-assembled "ghost guns", a White House official told reporters. The details of the rule were not immediately clear.
The department also will issue proposed rules within 60 days that make clear that devices marketed as "stabilising braces" that effectively turn pistols into rifles will be subject to the National Firearms Act, which requires the registration of firearms, the official said.
Other measures include investment in community violence prevention, the planned release of a model "red flag law" that states can use to draft their own versions, and plans for a Justice Department report on arms trafficking. Red flag laws allow courts and local law enforcement to remove guns from people deemed a risk to communities.
Gun control is a divisive issue in the United States, which has experienced a significant number of deadly mass shootings for decades. The US Constitution's Second Amendment protects the right to bear arms.
The Biden administration has been working on gun control measures for months that would limit gun violence without starting a legal battle that could lead to courts quickly dismantling the policies.
The official said Mr Biden would continue to advocate for legislation and called the administration's planned actions on Thursday initial steps.
Recent mass shootings in Georgia and Colorado have put pressure on the White House to act on its own. Legislation is not likely to pass swiftly through Congress.
The top Republican in the US House of Representatives, Kevin McCarthy, criticised Mr Biden's move.
"President Biden plans to announce his attempts to trample over our constitutional 2A rights by executive fiat," McCarthy said in a tweet. "He is soft on crime, but infringes on the rights of law-abiding citizens."
The National Rifle Association said it would fight Mr Biden's executive actions.
"Biden has made clear his sights are set on restricting the rights of law-abiding gun owners while ignoring criminals and foregoing substantive measures that will actually keep Americans safe," spokeswoman Amy Hunter said.