(Cranston, RI)--Two ACI correctional officers were hospitalized after reportedly discovering an unknown white substance in the facility last night.The finding of the material in a plastic bag near the ACI's intake center, made at around 6 p.m., triggered a hazmat response and the building was put on lockdown.An ACI spokesperson says the officers returned from Kent County Hospital later in the evening and are fine.The substance is being tested by the Rhode Island Department of Health.