Drug-enforcement agents nabbed a tractor-trailer loaded with 21 kilos of heroin laced with fentanyl as it drove through The Bronx, authorities said Tuesday.

The truck with Maine license plates was being driven by Luciano Osobampo-Armenta, 33, on Oct. 8 around 8:50 p.m. on Bruckner Boulevard, they said.

Investigators with the DEA Strike Force stopped the trailer as part of an investigation and found 6 kilos of the drugs in the cab of the truck and 15 kilos in the trailer.

The drug was wrapped in vacuum-sealed plastic-wrapped brick-shaped packages.

According to the criminal complaint, the driver was the sole occupant of the truck.

Osobampo-Armenta was charged with two counts of criminal possession of a control substance.