A teen girl was stabbed and her 6-year-old brother injured in the face during an assault near Azusa late Friday.
The suspect was believed to be the 25-year-old older brother of the two victims. He allegedly became angry during a family dinner at the mother's house.
Los Angeles County Sheriff's Department deputies took Jorge Cornejos of Azusa, 25, into custody in the alleged assault, which authorities said occurred at about 8 p.m. in the 17800 block of Laxford Road, in an unincorporated area.
A knife believed to have been used during the attack was recovered at the scene, Sgt. Dave Buckner of the San Dimas Station said.
"A preliminary investigation revealed that suspect Cornejo allegedly attacked friends and family while he was visiting at the location," he said.
Armand Tejada, a witness on scene, said the teen girl was stabbed in the waist area, though Buckner said the 17-year-old had been stabbed in the leg.
The young boy, who the Tejada said was the girl's brother, had been struck in the face and body, Cornejo said.
Both victims were treated at a local hospital, as was Cornejo, who was treated for unspecified injuries related to a preexisting medical condition.