NEW : More searches are scheduled for tomorrow , according to Coast Guard . Coast Guard found debris that might come from downed aircraft . Rescue crews have yet to find it despite seven searches . The pilot and two passengers took off from the Dominican Republic .
NEW : Three searches are planned for Monday , according to Coast Guard . Coast Guard found debris that might come from downed Cessna . Rescue crews have yet to find Americans despite seven searches . The pilot and five passengers took off from the Dominican Republic .