In a statement, this evening, the United States Federal Bureau of Investigation (FBI) admitted that fake e-mails had been sent from one of its servers, at the same time denying that he had been exposed to the sister.

In a statement posted on its Twitter account, the FBI said, "The FBI is aware of a programming error, which has allowed a party to temporarily access the law enforcement portal and use it to send fake emails."

The statement explained that the "Law Enforcement Corporation Portal is an information technology infrastructure of the FBI and is used to communicate with our partners in law enforcement agencies."

According to the statement, the FBI confirmed that no data of any kind on its site had been hacked or accessed, explaining that the security gap in the system had been eliminated.

US media said yesterday that the FBI had been attacked, causing thousands of fake e - mails to be sent.

Fake e - mails sent from an FBI security server warn of cyber attacks.

According to the FBI, fake e - mails were sent on two waves early Saturday from an address on the State Law Enforcement Foundation portal, which is used by several government agencies.

Some of the fake messages were titled, "Urgent: a threat factor in systems. "

The messages included an alleged warning to recipients that they were the target of a "complex" piracy attack by a known extortion ring.