Five children from Fitchburg who were reported missing March 5 have been found safe in Texas with their mother and her boyfriend, both arrested on kidnapping charges.

The children, who range in age from 9 months to 10 years, were in the custody of Texas Child Protective Services, according to officials.

The Worcester County District Attorney’s Office and the Massachusetts Department of Children and Families are working with authorities in Texas to bring them back to Massachusetts.

Their mother, Ruth Encarnacion, 30, and her boyfriend, Isael Rivera, 31, who is the father of the four youngest children, are facing five counts of custodial kidnapping of a minor by a relative, Fitchburg police said.