HACIENDA HEIGHTS — A 13-year-old Santa Monica girl died and a boy and a woman were hospitalized early Sunday after they were struck by an alleged drunken hit-and-run driver while their car was disabled along the right shoulder of the 60 Freeway, authorities said.

A 41-year-old Santa Monica woman suffered major injuries in the crash, and a 10-year-old Santa Monica boy suffered moderate injuries, CHP officials said in a written statement. The relationship between the three victims was not immediately clear.

The crash was reported about 12:40 a.m. on the 60 Freeway, just east of Seventh Avenue, according to Officer A. Smith of the CHP’s Santa Fe Springs office.

Tina Silva, 28, of Hacienda Heights was drunk as she drove her 2012 Honda Civic westbound on the freeway at about 60 mph, the officer said.

Ahead of her, the woman and two girls were waiting on the right shoulder of the freeway with their disabled 2002 Toyota Corolla, Smith said. The woman and 13-year-old girl were standing outside the car, while the 10-year-old boy was sitting in the rear of the vehicle.

For unknown reasons, Smith said, Silva’s Honda drifted toward the right shoulder, striking the two pedestrians and the Toyota.

“(Silva) exited the freeway at 7th Avenue in the City of Hacienda Heights and was later contacted by law enforcement,” Smith said.

According to county booking records, Silva was being held without bail pending a scheduled arraignment Tuesday in El Monte Superior Court.