U.S. officials have warned military personnel that Islamic State forces may be planning attacks against them in the United States, ABC News reported on Monday.

A joint intelligence bulletin sent to law enforcement agencies by the FBI and the Department of Homeland Security urged members of the U.S. military to erase from their online social media accounts anything would draw attention from "violent extremists," or reveal service members' identity, the news network said.

ABC said the government indicated late Sunday it had obtained intelligence that Islamic State militants, who have taken over parts of Iraq and Syria with the intention of setting up a fundamentalist caliphate, were targeting the United States within its borders.