Woman in California shootings had tried to contact extremists - U.S. source

WASHINGTON (Reuters) - Shooter Tashfeen Malik tried unsuccessfully to contact multiple Islamic militant groups in the months before last week's San Bernardino, California, attack, a U.S. government source said on Thursday. Two U.S. government sources said the militant groups likely ignored Malik's approaches because they have recently become extremely wary of responding to outsiders who they do not know or who have not been introduced to them. (Reporting by Mark Hosenball; Editing by Bill Trott)