( CNN ) -- Investigators have found human remains at the site of a crash in northern Mexico believed to have killed Mexican-American singer Jenni Rivera , but the family continues to hold on to a sliver of hope for a miracle . Civil aviation officials say they believe no one survived the crash . Yet Rivera 's family says hope is the last thing to go . Authorities would not describe the condition of the remains , but said they do not know how many people they belong to . The remains were found Tuesday at the site of the wreckage and were transported to Monterrey , the same city the private Learjet took off from , said Priscila Rivas , spokeswoman for the state 's public ministry . It is too early to tell if Rivera 's remains were among those found , Rivas said , but DNA tests are under way . Test results could take anywhere from a day to weeks , she said . Rivera 's brother , Lupillo , arrived in Monterrey from the family 's home in Lakewood , California . Before he left California , he described the situation as `` 95 % bad news , '' but added that the family is clinging to the small hope that Jenni Rivera somehow survived . A makeshift altar with flowers , balloons and candles appeared on the family 's front lawn . `` I trust in God , and he gives me strength , '' said Rivera 's mother , Rosa Rivera . `` I know that if indeed ( she 's dead ) , I would thank God for the time he shared her with me , for the precious time she called me Mother . '' Six others , including two pilots , were thought to be on board the plane , which lost contact with air traffic controllers soon after takeoff . Born in Long Beach , California , to Mexican immigrant parents , Rivera , 43 , released her debut album in 1999 , according to her website . She sings traditional Mexican ballads , and was nominated for a Latin Grammy Award in 2002 in the category of `` Best Banda Album . '' In October , People en Espanol named Rivera to its list of the 25 most powerful women . Famous for her music , she is also known for her tumultuous personal life . The singer was a single mom at the age of 15 and is the mother of five , her website said . Rivera 's `` I Love Jenni '' reality show began airing on Telemundo 's mun2 network last year . She is a judge on the popular TV show `` The Voice Mexico , '' which was scheduled to air Sunday night on Televisa . Noting its concern for Rivera , Televisa said it would air a special report on the singer instead . `` To all her fans who are suffering , I say thank you , and do n't suffer . Soon we will have news of her , '' Rosa Rivera said . CNN 's Jaqueline Hurtado and CNNMexico.com contributed to this report .
Remains have been found at the site where Jenni Rivera 's plane is believed to have crashed . Investigators can not say whose remains they are yet and would n't describe their condition . DNA tests are under way ; results could take from a day to weeks , official says .