Salter confirmed that samples of the seized product had been collected for testing by the DEA. He estimated that it could be up to four weeks before results are available.

It was unclear Monday how the federal government shutdown might affect testing procedures. According to Department of Justice information, 14 percent of DEA employees were furloughed, leaving more than 7,500 agency staff on the job, but media inquiries could not be addressed because of the shutdown, according to a phone message at the DEA public affairs office.

Pawhuska police stopped a tractor-trailer rig and a van providing security for the rig after a traffic violation, Pawhuska Police Chief Rex Wickle said. The rig and van drivers disclosed to the patrol officer that they were hauling industrial hemp.

Wickle said the odor of marijuana was detected. A field test of the substance being shipped came up positive for marijuana, he said.

“We’re now waiting to come back with the quantity of THC in the marijuana,” Wickle said. For hemp to be legal, it must contain no more than three-tenths of 1 percent THC, the intoxicating chemical in cannabis. Marijuana for medical or recreational use is closer to 15 to 20 percent THC.