Sen. Marco Rubio Marco Antonio RubioFlorida senators pushing to keep Daylight Savings Time during pandemic Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Intelligence chief says Congress will get some in-person election security briefings MORE (R-Fla.) revealed Thursday that former members of his presidential campaign team were targeted by IP addresses located in Russia.

Rubio disclosed the attempts, which he said were unsuccessful, during a Senate Intelligence Committee hearing on Russian election interference on Thursday.

Rubio was one of several Republican presidential candidates who lost out to Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE during the primary last year. Rubio dropped out of the race last March after losing his home state of Florida to Trump.

Former members of his campaign team were targeted shortly after he left the race and as recently as Wednesday, Rubio said.

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“In July of 2016, shortly after I announced that I would seek reelection to the U.S. Senate, former members of my presidential campaign team who had access to the internal information of my presidential campaign were targeted by IP addresses with an unknown location within Russia,” Rubio said. “That effort was unsuccessful.”

“I also want to inform the committee that within the last 24 hours, at 10:45 a.m. yesterday, a second attempt was made, again, against former members of my presidential campaign team who had access to our internal information, again targeted from an IP address from an unknown location in Russia,” he said. “That effort was also unsuccessful.”

Rubio did not offer up any details on the severity of the attempted intrusions. An IP address located in Russia also does not necessarily mean that his former campaign aides were targeted by the Russian government.

Thursday’s open hearing was the panel’s first since announcing its investigation into Russia’s cyber and disinformation campaign against the 2016 presidential election.

Both the House and Senate Intelligence Committees are probing Russia's election interference, which the intelligence community has concluded was aimed at undermining the U.S. democratic process and damaging Democratic nominee Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE.

FBI Director James Comey also revealed last week that the bureau is investigating Moscow’s hacking campaign, including whether there was any coordination between associates of Trump’s campaign and Russia.