Updated

A Connecticut couple is suing their local school system and four staff members for allegedly indoctrinating their three daughters into a religious cult.

The couple filed the lawsuit in federal court Monday against the Avon school district, three teachers and a guidance counselor at Avon High School and Wellesley College in Massachusetts. The parents are known only in court documents as Jane and John Doe.

The couple says the teachers and counselor indoctrinated their daughters into a cult that promotes martyrdom and celebrates death. They say the indoctrination by the teachers continued when two of the girls went to Wellesley.

The couple says their daughters have become secretive, have lost their humor and empathy and are speaking a bizarre language.

Avon and Wellesley officials say they're looking into the allegations.