It is not clear how long the wiretap has been authorized, but NBC News has learned it was in place in the weeks leading up to the raids on Cohen’s offices, hotel room, and home in early April, according to one person with direct knowledge.

At least one phone call between a phone line associated with Cohen and the White House was intercepted, the person said.

Previously, federal prosecutors in New York have said in court filings that they have conducted covert searches on multiple e-mail accounts maintained by Cohen.