The FBI is at the New Jersey home of the sister of the Boston Marathon bombing suspects.
The police director in West New York says the woman told authorities she has not been in frequent touch with her brothers. He says she is very upset.
Police did not have her name.
The woman, speaking through a crack in the door, tells The Star-Ledger of Newark her brothers are smart and great people. She says she doesn't know what got into them.
She also tells the newspaper she is sorry for "all the people who are hurt."