An armed suspect with a long rifle and explosives has been barricaded since midday June 9 in a south Minneapolis apartment after firing on Hennepin County deputies, shooting down a police drone, and releasing two hostages; FBI and ATF are on scene with the standoff ongoing.

Oklahoma County prosecutors filed first-degree murder charges June 5 against two men for the May 3 Arcadia Lake mass shooting in which at least 80 rounds were fired, killing Avianna Smith-Gray and wounding 24 others including six juveniles, with a gang-related offense count in the charging documents.

Multiple gunmen shot 12 people near the Old West End Festival in Toledo, Ohio on June 6, wounding two critically; no arrests have been made.

A gunman killed an 18-year-old and wounded three others, including an 11-year-old, in a Fairfield, California high school parking lot during a graduation ceremony on June 4; no suspects are in custody.

The San Diego mosque attack was a hate-driven mass shooting in which two online-radicalized teen gunmen used white supremacist accelerationist ideology, anti-Muslim target selection, livestreamed violence, and a propaganda-focused manifesto to frame the killing of three mosque community members as part of a broader effort to inspire racial and ideological violence.

Two teenage attackers killed three at the Islamic Center of San Diego before dying by self-inflicted gunshot, with the mosque security guard credited by police as pivotal in preventing a larger event; FBI and SDPD are working the case as a hate crime.