Included was a 39-year-old woman who reportedly took her 8-year-old son along when the arsons happened, according to an arrest warrant affidavit released Friday.
Sonji Lynn Hernandez (above) and the teens were arrested Thursday night and Friday, Fort Worth Fire Department investigators announced.
All five suspects were being held Sunday night in the Mansfield Jail.
Bail for Sonji Hernandez was set at $35,000. Her daughter's bail was $10,000.
Bail for the other three suspects was set at $5,000 each, but they also had immigration holds placed on them.
They are twin brothers Jose and Carlos Zapata, both 19, and Daniel Perez, 18.
-- Bill Miller