Former Trump campaign chairman Paul Manafort was placed under U.S. government surveillance after he left Trump’s campaign, according to The Wall Street Journal.

U.S. officials told the Journal that the surveillance wasn’t centered on listening to Manafort’s phone in real time, but the warrant they obtained did allow them to obtain his emails and other electronic communications.

Current and former officials also say intelligence reports suggest Manafort was communicating with Russian operatives in 2015, according to the Journal.

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The report follows a Monday report that Manafort was wiretapped during and after the 2016 presidential campaign.

Sources told CNN that federal investigators had obtained a secret court order under the Foreign Intelligence Surveillance Act (FISA) in 2014. That warrant allegedly focused on his work consulting for the government of Ukraine.

That warrant was reportedly ended in 2016, but the FBI obtained a second one soon after, which lasted until early 2017, including periods when Manafort was speaking with Trump.

CNN reported the second warrant was allegedly part of the ongoing investigation into Russia's election meddling and any ties between Trump’s campaign and Moscow.

Investigators were reportedly concerned that some of the intelligence collected by wiretapping Manafort included communications that indicated Manafort had sought Russia’s help for the Trump campaign, but two sources told CNN that the evidence is not conclusive.

The Journal said Thursday that new FBI Director Christopher Wray met with congressional officials this week to discuss the FBI’s surveillance of Manafort.