RIVERDALE, Ill. (CBS) — Two pedestrians are dead after a hit-and-run on I-57 near 138th Street Sunday morning.

The man and woman were outside their vehicle around 4:30 a.m. as it was loaded onto a tow truck when they were hit by a passing vehicle, according to Illinois State Police.

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The 2018 white Toyota Camry that hit them stopped, but the people inside got out and fled the scene on foot. Troopers later learned that the vehicle was stolen.

State Police have not identified the deceased victims by name, but said they were a 35-year-old woman from Chicago and a 34-year-old man from Bolingbrook.

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All lanes of I-57 northbound were closed for about six hours until shortly after 10 a.m. as troopers investigated.

The investigation is ongoing.

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Anyone with information about the incident is asked to contact ISP at 847-294-4400. Callers can remain anonymous.