A Texas man remained in the Warren County Jail Friday on a $75,000 bond charged with possession of a schedule IV controlled substance with intent to distribute, jail records show.

Vicksburg police Thursday arrested Oscar Hugo Onate, 30, 134 N. Denver St. Dallas, inside the U.S. Post Office on Pemberton Square Blvd. when he tried to pickup a package containing 100,000 pills of the diet drug sibutramine. The U.S. Drug Enforcement Administration is listed as the investigating agency on county booking records.

Authorities said Onate is accused of receiving the drugs from China through the Post Office, and the package seized by officers had a China business address. Mississippi Bureau of Narcotics Director Marshall Fisher said sibutramine contains a drug that is banned in the U.S. because it has been linked to heart attacks and stroke.

Onate’s arrest was the result of a three-week investigation by the U.S. DEA, U.S. Immigration and Customs Enforcement, U.S. Postal Service and the MBN, with assistance from the Vicksburg Police Department. He was arrested after authorities intercepted the package, according to MBN.