US government officials briefed 21 from 50 US states that hackers attempted to violate last year's electoral systems.
Only last year, the government had admitted that more than 20 states had targeted hackers who are said to be Russian agents before the presidential election of 2016. However, the notification from the Department of Homeland Security was the first official confirmation for many states whether their states were targeted or not.
The Associated Press contacted each election service, those who confirmed that they were targeting Alabama, Arizona, Colorado, Connecticut, Illinois, Iowa, Maryland, Minnesota, Ohio, Oklahoma, Pennsylvania, Virginia, Washington and Wisconsin.
Although the government did not disclose or provide any details on hackers, it was stated that in three states hackers could connect with Russia.
The Wisconsin Election Commission stated that their systems were targeted at "government agencies of the Russian government".
"It is completely unacceptable that DHS took more than a year to inform our office of Russian scanning of our systems, despite our repeated requests for information," said California Secretary of State Alex Padilla.
It was stated that there was no violation of sensitive data, the scanning of computer systems became a preparatory activity. The voter registration system targeted but did not hit software. Most attempts to hack the networks, but were unsuccessful.