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Authorities in Michigan released a surveillance video they say shows a silver SUV that may be connected to a missing mother who worked the late-night shift at an ExxonMobile gas station.

Jessica Heeringa, 25, disappeared Friday night around 11:15 p.m. at the ExxonMobil station where she worked in Norton Shores, near Muskegon. Her purse and car were left behind, and police were notified after a customer called 911 and said no employees were at the station, Fox 17 reports. There were no security cameras operating at the time of her disappearance, Norton Shores police say, and authorities are investigating the case as an abduction.

Heeringa's grandparents were interviewed on "Fox and Friends" Tuesday morning and said they believe the abductor is someone who "at least frequented" the gas station. The driver of the SUV seen in the surveillance video provided by a nearby bar  was described as an overweight man in his 30s or 40s.

"She's a good mom. She loves her family…she wouldn't just leave," April Dyer, Heeringa's future sister-in-law, told Fox 17. Jessica Heeringa has a 3-year-old child, and Dyer said her fiancé is distraught.

Norton Shores Police Chief Daniel Shaw said she may know her abductor.

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    "As a store clerk, she has contact with a lot of people," Shaw said. "Most of the people who have talked to us so far have indicated that she’s a very pleasant person – very sociable – so she engages in conversation with all of her customers, so it’s very possible that she may have known this person.”

    To assist in the search, Heeringa’s family will be handing out fliers -- containing information about Jessica -- at the parking lot behind the gas station Monday beginning at 10 a.m., Fox 17 reports.