Jessica Heeringa, 25, a cashier at a Norton Shores, near Grand Rapids, Michigan gas station, was reportedly abducted late Friday evening, according to CNN affiliate WOOD-TV.
"Something very bad happened," the police chief 40 miles west of Grand Rapids said.
"This was an abduction, not just a missing person," Chief Daniel Shaw told the station. "There was nothing disturbed inside the store. There was no sign of a struggle or a robbery had occurred," Shaw told the station. Heeringa's purse was left in the store, and her car was still there, WOOD reported.
Heeringa last served a customer about 10:50 p.m., police said.
"Between the time that last purchase was made and the time that the customers came in and found the store empty is when Jessica was abducted," Shaw said.
"We have spoken with the person who made the purchase there and cleared them of any wrong. And unfortunately, they didn't see anything that would lead them to believe there was something going on at the store that was leading to that abduction." The chief told the station police are looking for the driver of a silver minivan who was seen in the store's parking area late Friday.
Shaw described the assailant as a white male, between 30 and 40, with wavy hair parted in the middle, according to WOOD. The van could have been a Chrysler Town and Country, he told the station.
The store did not have security cameras.
"We are desperately looking for additional information," he told WOOD on Monday morning.
"We are searching! Hang tight! The whole Country wants you home!" said a Facebook post from Monday morning. Tips had come in from as far away as New Jersey, Missouri and Arkansas, WOOD reported.
Heeringa is described as 5 feet, 1 inches tall, 110 pounds with blond hair with blue eyes, and glasses.
Local police, the county sheriff's department and Michigan State Police are involved in the investigation, according to local media reports. The FBI has also been contacted, reports said.
"We've got a team of detectives and investigators on staff all day and night to track down those leads," Shaw told WOOD.