A pair of drug felons rang in the Fourth of July early Sunday by busting out of a federal prison in Texas.

Inmates Arturo Campos-Zamora and Christopher Salazar were discovered missing from a satellite camp adjacent to FCI Three Rivers in Three Rivers, Texas just before 2:30 a.m., according to the Federal Bureau of Prisons.

Arturo Campos-Zamora, left, and Christopher Salazar.

Arturo Campos-Zamora, left, and Christopher Salazar. (US Department of Justice)

Campos-Zamora, 57, is described as a "White male" with black hair, brown eyes, 5’7", weighing approximately 152 lbs. Salazar, 27, is described as a "White male" with brown hair, brown eyes, just under 6 feet, weighing approximately 260 lbs. 

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Both men were sentenced in the Western District of Texas and were serving time for conspiracy with intent to distribute methamphetamine: Campos-Zamora for two and a half years; Salazar for two years. 

FCI Three Rivers houses 176 male offenders. The satellite camp from which Campos-Zamora and Salazar escaped is a minimum-security facility. 

Fox News has reached out to the Federal Bureau of Prisons seeking more information on the suspects. 

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Anyone with information on the escapees is urged to contact the United States Marshals Service at 361-888-3154. 

Fox News' David Spunt contributed to this report.