An illegal immigrant in Massachusetts is facing drug and firearm trafficking charges after he was taken into custody following a bust that found him possessing an AR-15 rifle and kilograms of drugs, including fentanyl, authorities said.

Dominican national Leonardo Andujar Sanchez, 28, was arrested on Dec. 27 following the bust at a state-run emergency family shelter in Revere that led to the discovery of the illegal immigrant at a Quality Inn, according to a report.