The Metropolitan Detention Center, Guaynabo (MDC Guaynabo) is a United States federal prison facility in Guaynabo, Puerto Rico which holds male and female inmates of all security levels who are awaiting trial or sentencing. It is operated by the Federal Bureau of Prisons, a division of the United States Department of Justice. MDC Guaynabo is located next to Fort Buchanan U.S. Army base, and is 6 miles (9.7 km) west of San Juan, the capital of Puerto Rico. In the wake of the destruction of Hurricane Maria in September 2017, some 1200 federal prisoners were transferred from Guaynabo to the Federal Correctional Institution, Yazoo City in Mississippi. Those 1200 were returned to Guaynabo in the first quarter of 2018, along with other prisoners who had been temporarily held in Georgia, Alabama, and Florida.