BANGOR — Federal prosecutors say two Bangor residents have pleaded guilty to selling the synthetic drug known as bath salts.

Authorities say 36-year-old Adam Hathorn and 32-year-old Tina Keaton pleaded guilty to the drug-related charges on Wednesday in U.S. District Court in Bangor.

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Prosecutors say the pair illegally distributed the drug in Penobscot County and elsewhere between April 2011 and December 2011.

They face up to 20 years in prison and a $1 million fine at sentencing, which has not been scheduled.

Hathorn and Keaton are two of 14 people charged as part of the conspiracy.

Bath salts are a synthetic hallucinogenic that can make users delusional and violent.