( CNN ) Two Delaware boys are in a coma and their father still is unable to talk or move two weeks after they became sick -- perhaps from pesticide exposure , federal officials say -- during a trip to the U.S. Virgin Islands , their lawyer said Saturday . Steve Esmond , his teenage sons and the teens ' mother fell ill more than two weeks ago in St. John , where they were renting a villa at the Sirenusa resort . The family was airlifted to hospitals in the United States . The boys , 16 and 14 , were in critical condition at a Philadelphia hospital on Saturday , the family 's lawyer , James Maron of Delaware , said . `` The boys are in rough shape , '' Maron said . `` The family are all fighters , '' he added . `` They 're fighting for everything right now . I understand it 's a long recovery . '' Esmond , also being treated at a hospital , is conscious but can not move , Maron said . The teens ' mother , Theresa Devine , was treated at a hospital but released , and is now in occupational therapy , Maron said . The U.S. Environmental Protection Agency said Friday that the presence of a pesticide at the rented villa in St. John may have caused the illnesses , which were reported to the EPA on March 20 . Paramedics were called to the villa , which the family began had been renting since March 14 . Esmond was found unconscious ; the boys and their mother were having seizures , Maron said . The lawyer did not say who called the paramedics . Elias Rodriguez , an EPA spokesman , said the agency 's preliminary test results `` do show that there was a presence of methyl bromide in the unit where the family was staying . '' Exposure to methyl bromide can result in serious health effects , including central nervous system and respiratory system damage , according to the EPA . The use of the pesticide is restricted in the United States because of its acute toxicity . It 's not allowed to be used indoors . Only certified professionals are permitted to use it in certain agricultural settings . `` It 's an ongoing investigation ; we 're still on the island doing our assessment , '' Rodriguez said . `` We have been doing different types of air sampling and wipe sampling . '' Final test results were expected next week . The EPA said it is working with local government agencies to investigate whether the family was made ill after a fumigation at the resort on March 18 and whether any environmental regulations or laws were violated . Maron , the family 's attorney , declined to comment on the investigation . Depending on the season , the luxury villa where the family stayed rents between $ 550 and $ 1,200 per night . Sea Glass Vacations , which acts as a rental agent for several units at Sirenusa , said the unit directly below the one where the family stayed was recently treated for pests , but their unit was not treated . The company said it licensed an outside company , Terminix , for the pest control services . `` Sea Glass Vacations does not treat the units it manages for pests but instead relies on licensed professionals for pest control services , '' the company said in a statement . The U.S. Department of Justice has initiated a criminal investigation into the matter , according to a U.S. Securities and Exchange Commission filing made Monday by ServiceMaster Global Holdings , the parent company of Terminix . In an email to CNN , a spokesman for Terminix wrote that the company is `` committed to performing all work ... in a manner that is safe for our customers , employees , the public and the environment '' and is `` looking into this matter internally , and cooperating with authorities . '' `` We 're thinking about the family , and we join the community in wishing them a speedy recovery , '' Terminix wrote . The SEC filing described the injuries to the family members as `` serious . ''
A Delaware family becomes ill at the Sirenusa resort in the U.S. Virgin Islands . The island of St. Croix is a popular destination for tourists and residents alike to escape from the heat on the mainland.