A 39-year-old woman was killed Sunday after the personal watercraft she was riding on collided with another on a Carlsbad lagoon, authorities said. Carlsbad police were called to California Water Sports on Harrison Street near the Agua Hedionda Lagoon just before 4 p.m. where they learned that a 17-year-old boy had been driving one watercraft that collided with another driven by a man with a female passenger. The passenger suffered fatal injuries. She died at a hospital, police said in a news release. No other injuries were reported. Police are investigating the incident to determine the cause of the collision. Neither alcohol nor drug appear to have been factors.