Two Butler County men are accused of going to extreme measures to try to pass their drug tests.

But alert county probation officers caught the suspects dirty handed with the illegal “clean” urine, authorities said.

Butler County Detective Tim Fennell on Tuesday charged the probationers, Colin S. Kelly, 35, of Butler and Austin M. Rottman, 24, of Butler Township, with attempting to furnish drug-free urine in the separate cases earlier this month.

Kelly and Rottman are being held in the Butler County Prison for their respective probation violations.

Authorities said Kelly on July 12 appeared at the adult probation office in Butler for a mandated alcohol and drug screening. But the sample he submitted didn’t look right to his probation officer, according to court documents.

After taking a closer look, the officer found Kelly with a “spray bottle containing urine concealed in his underwear,” Fennell said in his affidavit.

When Rottman showed up July 7 at the office for his appointed screening, his probation officer noticed “a device in (the suspect’s) crotch area,” documents said,

The device, Fennell said, turned out to be a bottle containing “fake urine and a tube.”

Kelly and Rottman both face preliminary hearings Aug. 15 at the office of District Judge William Fullerton.