UPDATE: Police are taking seriously a note that says a man forced two children into a truck at an Indianapolis gas station and went south on I-65. The note was found taped to a mirror in a rest stop bathroom in Bullitt County, Kentucky.

Investigators admit there are some red flags in this case, but they say until it's proven a hoax, they have to take it seriously.

Kentucky authorities said they did track down a truck driver that fit the description in the letter. After questioning him however, officials do not think he's involved. The search to authenticate the note continues.

It's no longer than a few sentences on a single sheet of paper, but its content was enough to raise several eyebrows.

"We're at a crossroads to substantiate whether or not if anyone knows who these kids are if they are, in fact, kids," said Detective Scotty McGaha.

A janitor found the note Wenesday morning, taped to a mirror in the men's restroom at a Pilot rest stop. That rest stop is off of I-65 in Bullitt Co., Kentucky which is about 7 miles south of Louisville.

The note claims to be written by a little boy and girl claiming to be from Indianapolis: Josh and Laura McKae. In part, it reads:

"Whoever finds this note please call the cops."

"This man in this truck made us leave with him."

"P.S. hurry!"

The brother and sister describe the van they were taken in as a big red and white one. They say the truck driver was taking them to Nashville and then back to his house in Hopkinsville, Kentucky.

Kentucky authorities told Fox59 News they aren't sure if the note is legit, but they say it's their job to investigate it regardless. So far, no parents here in central Indiana have come forward to report any missing children.

In the meantime, authorities are trying to locate and talk to truck drivers who passed through the area Wednesday morning.

"There are a few flags that are raised to us that this could be a fluke, but again as a police agency, until you determine otherwise, you got to take this stuff pretty serious," said Det. McGaha.

If you have any information, contact Indiana State Police.

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"If anyone may have seen something suspicious that involved maybe some younger...maybe a man and a woman along with a truck driver maybe," Detective Scotty McGaha of the Bullitt County Sheriff's Department.

It is the child abduction case without faces.

"We're kind of at a crossroads to substantiate whether or not if anyone knows who these kids are if they are in fact kids."

Wednesday morning Bullitt county detectives got involved after a janitor found this note on the mirror of the men's room at a rest stop.

"Give his name the girl's name...it's his sister...their last name is McKae...M.C.K.A.E...says we're from Indianapolis, Indiana...the man in the truck made us leave with him from Pilot," read Detective Scotty McGaha of the Bullitt County Sheriff's Department.

The names are Jose and Laura and the note alleges a truck driver abducted them from a Pilot gas station in the Bullitt County area and it also gives a description of the truck.

"We're in a big white and a red truck that says first fleet in red on the side of it...he says we're going to Nashville and then back to his house in I think he said Hopkinsville," continued the letter.

Meanwhile, police have actually been able to track down a First Fleet truck driver who was recently in Bullitt County and fits the description.

"The person who did pass through here yesterday was a 67 year old truck driver from Hopkinsville, Kentucky and they're trying to determine now what information he may have on this if there's anything to it," said McGaha.

And police have also not ruled out the fact that this could also be a hoax.

"There are a few flags that are raised to us that this could be a fluke but again as a police agency until you determine otherwise you got to take this stuff pretty serious," added McGaha.