A small number of those were successfully penetrated, she explained.
Jeanette Manfra, the U.S. official overseeing cybersecurity at the Department of Homeland Security, said that Russian Federation has targeted the voter registration systems of 21 USA states ahead of the 2016 election.
The opening paragraph of the story read: "Nearly half of the states in the US have recently had their voter registration systems targeted by foreign hackers, and four of those systems have successfully been breached, sources tell ABC News". Twitter users in swing states received more fake news than real news in the days leading up to the election, a study revealed late previous year.
Jeanette Manfra, the head of cybersecurity at the Department of Homeland Security, confirmed Wednesday that Russian Federation successfully hacked voter registration rolls in the 2016 presidential election.
US officials have said there is no evidence that any states' voter registration rolls were tampered with or at all altered by the foreign intrusions.
The Washington Post previously reported that computer systems in IL and Arizona were both successfully penetrated.
Jeh Johnson, who served as the department's secretary during the hacking, said they were "able to determine that the scanning and probing of voter registration databases was coming from the Russian government".
George W. Bush said that there was clear evidence that Russian Federation interfered with the 2016 election that President Donald Trump won against Democrat Hillary Clinton.
"If it's their intention to interfere, they are going to find ways to do that", Tillerson said in a Fox News interview.
According to NBC, many other states complained the government did not provide specific details about the threat from Russian Federation because the information was classified.
This story is developing.