A dozen people were killed and about 50 injured in shootings across the United States over the weekend.
The spate of shooting incidents included deaths in New Jersey, South Carolina, Georgia, Ohio and Minnesota.
In total, the attacks claimed 12 lives and wounded at least 49 others.
President Joe Biden had last month branded the country's gun violence an "epidemic." He has introduced six executive measures aimed at tamping down the crisis, including a proposed rule to halt "ghost guns," as firearms built from home kits are known.
Gun sales jumped at the beginning of the Covid-19 pandemic. Overall, 2020 was one of the most violent years in the United States in decades, news AFP has reported.
So far this year, there have been at least 200 mass shootings in the United States, according to the Gun Violence Archive.