The Jus­tice De­part­ment is prepar­ing to seek an in­dict­ment against for­mer Cuban Pres­i­dent Raúl Cas­tro, three peo­ple fa­mil­iar with the mat­ter told The As­so­ci­at­ed Press on Fri­day, as Pres­i­dent Don­ald Trump threat­ens pos­si­ble mil­i­tary ac­tion against the com­mu­nist-run is­land.

One of the peo­ple told the AP that the po­ten­tial in­dict­ment is con­nect­ed to Cas­tro’s al­leged role in the 1996 shoot­down of four planes op­er­at­ed by the Mi­a­mi-based ex­ile group Broth­ers to the Res­cue. Cas­tro was de­fence min­is­ter at the time.

All three peo­ple spoke on the con­di­tion of anonymi­ty be­cause they weren’t au­tho­rized to dis­cuss an on­go­ing in­ves­ti­ga­tion. The Cuban gov­ern­ment did not im­me­di­ate­ly com­ment on the po­ten­tial in­dict­ment, which was re­port­ed ear­li­er by CBS.