Police have not declared it a hate crime, but the American Arab Anti-Discrimination Committee wants it investigated as one.
Several people were shot at the New Hampshire state psychiatric hospital. The shooter is "deceased," police said.
The older teen, age 17, is also accused of taunting Texas investigators and livestreaming his arrest on Facebook.
Speaker Mike Johnson (R-LA) went on Fox News to offer thoughts and prayers – but no legislative action – after a mass shooting killed more than a dozen people in Maine.
Pedro Argote is accused of fatally shooting Washington County Judge Andrew Wilkinson after Wilkinson ruled against him in a child custody hearing.
Joyce Ann Small was arrested after opening fire outside a library and striking a homeless woman she'd previously helped, authorities said.
In Florida, Mariah Clayton "was inappropriately handling the rifle and was culpably negligent in her actions," authorities said.
Two men face charges in Holyoke, Massachusetts, after gunshots at a downtown intersection also struck a bus rider.
Nebraska authorities say the man unintentionally shot the 12-year-old with a blank round after he went to fire a gun in the air.
Footage of the incident shows Tanner Cook harassing Alan Colie for his YouTube channel, which features other “pranks” like pretending to vomit on Uber drivers.