ST. THOMAS - Federal agents arrested a 50-year-old cruise ship passenger Wednesday morning on charges of transporting into the territory hundreds of anabolic steroids that were stashed in his cabin.

Carlos Lesco, a New Jersey resident who was a passenger on Royal Caribbean's Explorer of the Seas, was taken into custody after the ship docked in Havensight, according to Immigration and Customs Enforcement spokesman Ivan Ortiz.

Later Wednesday, Assistant U.S. Attorney Jason Cohen brought to District Court a complaint charging Lesco with attempting to import a Schedule III controlled substance.

The crime carries a sentence of up to five years in federal prison and a $250,000 maximum fine, according to prosecutors.

Magistrate Judge Geoffrey Barnard set a detention for Friday and probable cause hearing.

Security staff aboard the Explorer of the Seas reported to federal officers that they suspected their passenger was transporting contraband, Ortiz said.

ICE agents searched the New Jersey man's cabin and found about 380 tablets of methandrostenolone, a steroid commonly used by body builders.

Ortiz said authorities were not sure where Lesco got the steroids, or where he planned to take them. Investigators will attempt to determine those details, he said.

The ship arrived on St. Thomas after leaving Casa de Campo in the Dominican Republic.

Agents with the Drug Enforcement Administration are assisting ICE with the case, Ortiz said.