A Nebraska petroleum company received a package on Thursday that contained surprising content, methamphetamine.

According to Lincoln Police, employees at Sapp Brothers Petroleum opened a package and found about a tablespoon of white powder inside.  They reported it to police, and health officials have said the the powder tested positive for meth.

An official at Sapp Brothers corporate office said that it is unclear why the package was delivered to the company.

According to their website, Sapp Brothers Petroleum operates 15 truck stops across Nebraska.

Investigators are still working to determine where the package came from.