JACKSONVILLE, Fla. -- Federal and agents conducted an investigation at the office of a Jacksonville doctor who specializes in pain management and family medicine, First Coast News has learned.

The raid took place at the Family Medicine and Rehabilitation Center at 7685 103rd Street on Jacksonville's Westside.

HAPPENING NOW: @FBI executing a search warrant at Family Medicine & Rehab Inc. on 103rd. Working to get more details. @FCN2go pic.twitter.com/rA0QHFv5Do

Law enforcement officials would not specifically confirm what they are looking for in the doctor's office, other than to say they are executing a search warrant.

According to the Sunbiz.org business directory, Total Lab Care and Family Medicine and Rehab, two of the more prominently displayed offices located inside the building, are both owned by Doctor Syed Hussain.

According to WebMD and HealthGrades.com, Hussain specializes in pain management and family medicine. Both pages say he's been practicing for 35 years.

A woman who answered the door at Hussain's Ortega home acknowledged Hussain was contacted by the FBI. She said he went Downtown but that she didn't know where he was or why they wanted to talk to him.