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MIAMI (CBSMiami) – The Florida Department of Law Enforcement has issued a missing child alert for two sisters who have not been seen since Thursday.

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According to the alert released on Saturday, 8-year-old Isabella Fernandez and 13-year-old Michelle Fernandez are believed to be in the company of 44-year-old Mike Fernandez and 39-year-old Anne-Marie McCrink.

Isabella Fernandez, 8, and Michelle Fernandez, 13, went missing May 8. The two are believed to be in the company of 44-year-old Mike Fernandez (R) and 39-year-old Anne-Marie McCrink (L). (Source: FDLE)

Isabella Fernandez, 8, and Michelle Fernandez, 13, went missing May 8. The two are believed to be in the company of 44-year-old Mike Fernandez (R) and 39-year-old Anne-Marie McCrink (L). (Source: FDLE)

Authorities did not say if the girls were related to the adults.

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They are believed to be traveling in a 2003 gold Dodge Caravan with a paper tag. The tag number is BJZ1632.

The girls were last seen together near the 1500 block of NE 191st Street.

“They were hanging out at somebody’s house. I saw them.  I thought they were just playing so I just left and I haven’t seen them since that day,” said a child at the park.

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On Friday afternoon, police were combing NW Miami Dade neighborhood, a trailer park near 202nd Street and 55th Ave, hoping someone had seen the girls.

Investigators said the older child has run away before.

“Michelle has done this in the past. This time a little different where she took her young sister who’s 8-years old with her,” said Daniel Ferrin with Miami-Dade Police.

Neighbor Jack Teachman who is close to the father said learning the children are gone surprised him.

“I spoke to the father last night. He called me to go feed the dogs. I fed the dogs and gave water.  He never mentioned anything about the daughters missing,” said Teachman.

Investigators said the children’s grandmother in North Miami has custody of the girls.

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Anyone with information in the case is urged to call Miami-Dade Crime Stoppers at (305) 471- TIPS.