Two people were killed and at least another dozen were injured as shots rang out at a house party in Illinois where people were gathering for Halloween.
It was one of at least 11 mass shootings in the US over the holiday weekend, including several at places where crowds had assembled.
The violence has left at least 12 people dead and another 52 injured.
The number of mass shootings in the US has increased during the coronavirus pandemic.
According to data from Gun Violence Archive, there have been 599 mass shootings so far this year.
There were 611 in 2020 and 417 in 2019.
