A hacker has published the personal information of some 20,000 Federal Bureau of Investigation (FBI) agents and 9,000 Department of Homeland Security (DHS) officers.

The hacker, tweeting from the account @DotGovs, advertised the data dump with a tweet which signed off "#FreePalestine." The data dumps, which include a list of names, job descriptions, phone numbers and emails, open with the message "Long Live Palestine, Long Live Gaza."

The hacker released the list of DHS agents on Sunday. Less than 24 hours later, he released the FBI data dump.

Several phone numbers on the list correspond to the names listed, according to website Motherboard. The job descriptions listed include special agent, field supervisor and task force officer, among others.

A US Department of Justice (DOJ) spokesperson told Motherboard that it is investigating the breach, but stated that there is no indication that “sensitive personally identifiable information” was revealed. DHS released a similar statement.

The hacker reportedly obtained the information by first accessing a DOJ email address and tricking an employee into giving him a code for the DOJ portal. He then accessed three DOJ computers and the department's intranet, where the data was found.

On Sunday, the hacker tweeted "When will the US government realize we won't stop until they cut relations with Israel."

Earlier that day, he tweeted "Be sure to tweet #FreePalestine to bring awareness to all the kids dying by Israeli bombs that the US government funds!"

(Sputnik)