NEW : Brazilian amputee model Stein died 3 a.m. . Da Costa 's hands , feet were amputated after she contracted septicemia . Da Costa 's placed tenth in the Miss Bikini International competition in China .
NEW : Brazilian amputee model Mariana Bridi da Costa died early Saturday . Da Costa 's hands , feet were amputated after she contracted septicemia . Da Costa placed sixth in the Miss Bikini International competition in China .