The victims are the driver and passenger in a car rear-ended by a semi on US-127 Tuesday afternoon.
Police in Jackson are investigating a third robbery in a week at the same gas station.
It happened at the Shell Station is located on the corner of Wildwood and West Avenue.
Investigators say the most recent robbery happened at about 1:20a.m. Sunday. A man walked in, jumped on the counter, threatened the clerk with a knife and demanded money.
When another employee came out from the back, the suspect took off without taking anything.
2820 East Saginaw Street, Lansing, MI 48912