Three women riding on a jet ski were killed when they crashed into a boat Saturday at a Los Angeles County reservoir.
Four people in the boat were injured, three seriously, County fire Inspector Matt Levesque said.
The women were pronounced dead at the scene at Puddingstone Reservoir near San Dimas, Levesque said.
The women were from the same family but their ages and identities were not immediately available, KABC television reported.
Three men from the boat were airlifted to hospitals, Levesque said. A woman from the boat suffered minor injuries.
Levesque says the Sheriff's Department is investigating the 4:30 p.m. crash.
Puddingstone is a recreational reservoir inside Frank G. Bonelli Regional Park, 30 miles east of downtown Los Angeles.