UFC lightweight contender Melvin Guillard was arrested Aug. 13 in Houston for violating probation on a 2007 drug charge, a Harris County deputy told Sherdog.com.

The 25-year-old New Orleans native is in custody at the Harris County jail in Houston, the deputy said last Thursday, and will be released to a drug treatment facility as soon as space becomes available per the terms of his recently amended probation.

Details of the violation were not readily available.