Department of Corrections Director Fred Bordallo, Jr. confirmed that on Thursday afternoon at the Adult Correctional Facility in Mangilao, Corrections officers conducted a security check that led to a major seizure of dangerous contraband. He says among the items recovered—sharp-edged weapons and materials that are both flammable and potentially explosive.

The Guam Police Department and federal agents from the ATF responded to the facility, launching an ongoing criminal investigation. Bordallo says the quick actions by Corrections staff may have prevented a potential riot or escape attempt.