Washington (CNN) Allen Weisselberg, a top Trump Organization official and the company's longtime chief financial officer, has been subpoenaed to testify as part of the ongoing criminal investigation into President Donald Trump's former attorney Michael Cohen, The Wall Street Journal reported on Thursday, citing people familiar with the investigation.

The Journal reported that it is unclear whether Weisselberg has gone before a grand jury, when the subpoena was issued and what exactly prosecutors want to ask him, but that he is considered to be a witness in the probe.

Weisselberg and a representative for the Trump Organization did not respond to the Journal's requests for comment. A spokesperson for the US attorney's office in Manhattan, which is investigating Cohen, declined to comment to the newspaper.

The news follows CNN's publication of a recording from September 2016 of a conversation between Cohen and Trump discussing how they would buy the rights to a Playboy model's story about an alleged affair with Trump. During the conversation, Cohen can be heard mentioning Weisselberg by name, saying at one point, "I've spoken with Allen Weisselberg about how to set the whole thing up."

A former Trump Organization employee told CNN that Weisselberg being subpoenaed as part of the Cohen probe is the "ultimate nightmare scenario for Trump" because Weisselberg knows "anything and everything" about the finances of the Trump Organization.

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