Four people were killed and 28 others injured in a mass shooting at a 16th birthday party in Dadeville, Alabama, on Saturday night. Authorities have not yet released information on the shooter or their motive.

The incident, which reportedly occurred at a dance studio, marks the highest number of injuries of any mass shooting this year so far, according to data from the Gun Violence Archive. It follows other recent mass shootings at a bank in Louisville, Kentucky, and at Covenant School in Nashville, Tennessee.

According to news reports, Philstavious Dowdell, a Dadeville High School football player and brother of the birthday girl, as well as KeKe Nicole Smith, a volleyball player and team manager for the high school’s track team, were among those killed. At least 15 teenagers are reportedly being treated for gunshot wounds.

In response to the shooting, President Joe Biden reiterated his calls for Congress to enact laws requiring safe storage of firearms and universal background checks, banning assault weapons and high-capacity magazines, and eliminating gun manufacturers’ immunity from liability.