Let R be a commutative Noetherian ring, α an ideal of R, and M a non-zero finitely generated R-module. Let t be a non-negative integer. In this paper, it is shown that dim Supp Hi a(M) ≤ 1 for all i 〈 t if and only if there exists an ideal b of R such that dimR/b ≤ 1 and Hia(M) ≌ Hi b(M) for all i 〈 t. Moreover, we prove that dimSuppHia(M) 〈≤dim M - i for all i.