Five people, including an infant and a 5-year-old girl, have been shot to death “execution-style,” authorities said Sunday.

The victims were shot Saturday night in a house about 20 miles east of downtown Los Angeles.

Sheriff’s deputies said they know of no motive, but they found evidence of drug use at the house.

Killed were two men, a woman and two of her four children, a 5-year-old girl and a 6-month-old boy. The other two children survived.