FOUNTAIN VALLEY, Calif. (AP/CBS13) — The Latest on schools warning about flutes tainted with body fluids (all times local):

8:45 p.m.

A California school district is warning parents that some students may have received flutes tainted with semen from a music teacher.

The Orange County Register says the Saugus Union School District notified parents Saturday about a state and federal investigation into handmade flutes that were handed out to youngsters in some classrooms by a music teacher and performer associated with the nonprofit group Flutes Across the World.

A message left for the group’s founder wasn’t immediately returned Saturday night.

Several other Southern California school districts also are warning parents about a state and federal investigation into the flutes.

Officials with the Fullerton district say fourth- through sixth-grade students at two schools took part in the program.

The Los Angeles Unified School District says the flutes may have been distributed to students in as many as 13 Southern California districts.

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5:02 p.m.

California school districts are warning that some youngsters may have received flutes tainted with body fluids.

The Orange County Register says at least three districts — Fountain Valley, Newport Mesa and Capistrano — notified parents about the situation this week.

Fountain Valley’s superintendent told parents that in June an independent music enrichment contractor gave fifth-grade students flutes that “potentially” were contaminated with unspecified body fluids.

The Register says the independent contractor worked in several Southern California school districts.

The flutes were made of plastic pipe and wine corks and could be colorfully decorated.

No arrests have been made but state and federal officials are investigating.

Some districts asked parents to preserve evidence by putting the flutes in sealed paper bags.