In the weeks before his abrupt termination, former FBI Director James Comey was increasingly involved with his bureau’s investigation into possible collusion between members of President Donald Trump’s campaign and Russian officials, the Wall Street Journal reported on Wednesday.

The Journal reported, citing unnamed sources “with knowledge of the matter and the progress of the Federal Bureau of Investigation probe,” that starting at least three weeks ago Comey began receiving daily rather than weekly updates on the probe.

According to those sources, Comey “was concerned by information showing possible evidence of collusion,” per the report.

The Washington Post, New York Times and NBC reported Wednesday morning that Comey asked the Justice Department’s second in command Rod Rosenstein for more resources to support the FBI’s investigation into Russian interference in the 2016 election.

Rosenstein later wrote a memo that Trump’s administration cited as its primary rationale behind Comey’s termination.