A personal water craft slammed into a powerboat on a California reservoir Saturday, killing three women and injuring four other people, authorities said.The crash occurred about 4:30 p.m. on Puddingstone Reservoir at San Dimas, the Los Angeles Times reported.The women, ages 25, 35 and 60, were dead at the scene, Los Angeles County Fire Department inspector Matt Levesque said. Their names had not been released.Three men on the boat, ages 22, 35 and 36, were critically injured. A 22-year-old woman on the boat suffered minor injuries.\"It was a tragic, tragic accident,\" said Imee Perius, a spokeswoman for the Los Angeles County Sheriff\'s Department and the Parks and Recreation Department.