President Joe Biden is set to announce new executive actions on gun control in the United States on Thursday, following the two deadly mass shootings last month, according to media reports.

The new legislation will, reportedly, make background checks on so-called ghost guns mandatory along with other measures to strengthen existing gun laws.

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Although the extent of Thursday’s announcement, which was first reported by Politico, still isn’t completely clear, and the White House did not elaborate.

“I expect the President will have more to say tomorrow,” press secretary Jen Psaki told reporters during a daily briefing.

Following the mass shooting in Boulder, Colorado, which claimed the lives of ten individuals, Biden said, “I don’t need to wait another minute, let alone an hour, to take common sense steps that will save lives in the future.”

What are ghost guns?

Handmade or self-assembled firearms without commercial serial numbers are tagged as ghost guns. Biden’s upcoming executive order will classify them as commercial firearms, hence requiring a background check, according to CNN reports.

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The administration plans to alert law enforcement agencies when someone fails a federal background check.

Gun control advocates say background check alerts could potentially flag troubled or criminal individuals who are trying to access weapons.

Following last month’s shootings, Biden called on Congress to take steps like re-enacting an assault weapons ban. 

While campaigning, Biden had said he would task his attorney general with instituting better enforcement of existing gun laws as a means of slowing gun violence.