The Unit­ed States has con­firmed plans to ex­pand trav­el re­stric­tions to 36 ad­di­tion­al coun­tries—in­clud­ing four in the Caribbean—ac­cord­ing to a State De­part­ment brief­ing on Tues­day.

Spokesper­son Tam­my Bruce did not con­firm any spe­cif­ic coun­tries named in a June 14 Wash­ing­ton Post re­port but ad­dressed the pol­i­cy's frame­work. The Post cit­ed a leaked memo signed by Sec­re­tary of State Mar­co Ru­bio that re­port­ed­ly in­cludes An­tigua and Bar­bu­da, Do­mini­ca, Saint Kitts and Nevis, and Saint Lu­cia among the coun­tries that could face new visa bans or oth­er trav­el lim­i­ta­tions.

Bruce said the pol­i­cy is based on a re­view of se­cu­ri­ty and co­op­er­a­tion stan­dards, not ge­og­ra­phy. “The ac­tu­al lo­ca­tion of the coun­try is not a fac­tor,” she said. “These are about very spe­cif­ic as­pects—whether or not the Unit­ed States feels it can trust the in­for­ma­tion we re­ly on those coun­tries for, to de­ter­mine whether or not they’ll get a visa.”