Updated

Three women were killed and four other people injured in a boating accident Saturday at Bonelli Regional Park in San Dimas, Calif.

The accident happened about 4:20pm local time at Puddingstone Lake in the park, 30 miles east of the Los Angeles city center, The San Gabriel Valley Tribune reported, citing fire department officials.

The deceased were riding a Sea-Doo jet ski when it crashed into a powerboat, the Los Angeles Times reported.

"It was a pretty severe accident in the middle of the water," Matt Levesque, a Los Angeles County Fire Department inspector, said.

The women, aged 25, 35 and 60, died at the scene. They were all members of the same family, KABC-TV reported.

Three men in the boat -- aged 22, 35 and 36 -- suffered critical injuries and were taken to Los Angeles County-USC Medical Center for treatment.

A 22-year-old woman suffered minor injuries when she was thrown from the boat. She was taken to a hospital by ambulance, KTLA-TV reported.

A number of helicopters were rushed to the site to transport patients.

"At this point, there's nothing to indicate there was alcohol, but that could change later," Los Angeles County Chief Lifeguard Hugo Maldonado told KTLA-TV.

The crash was being investigated by the Los Angeles County Sheriff's Department Parks Bureau.

"It was a tragic, tragic accident," Imee Perius, a spokeswoman for the parks department, said.