Mayor de Blasio is speaking out for the first time since news broke that not one but two grand juries are reportedly hearing testimony in connection with investigations into his fundraising. The mayor insists he has followed the law. NY1's Grace Rauh filed the following report.

As two grand juries in Manhattan reportedly weigh evidence against the mayor's fundraising and efforts to elect Democrats to the State Senate, he says he has done nothing wrong.

"We did things the right way and by the law," the mayor said on WNYC's "The Brian Lehrer Show."

Just a few hours later, when facing reporters at an unrelated event in The Bronx, the mayor refused to talk even as he was asked three separate times about the grand juries, whose existence was first reported by The New York Times.

    Mayor: "We are doing this topic right now, Marcia."
    Reporter: "You aren't going to talk about it?"
    Mayor: "No, not today. I'll talk to you next week."

The mayor has clashed with the City Hall press corps over his refusal to answer questions deemed "off-topic" at his regular events.

Since the spring, possible pay-to-play politics at City Hall have been under investigation. At issue is whether major donors to the mayor's non-profit organization, The Campaign for One New York, got favors from the de Blasio administration in return.

"We disclosed everything we were doing, which is why people are asking specific questions," the mayor said on radio. "We never provided any undue favors or anything for anyone who was a donor. We made decisions on the merits."

The mayor's ultimately unsuccessful effort to help Democrats take over the state Senate in 2014 is also being probed.

The empaneling of the grand juries indicates that prosecutors may be close to bringing indictments against one or more of the mayor's top aides or potentially the mayor himself. It comes as the mayor increasingly finds himself under fire, over failures within in the city's child welfare agency, a fine for campaign finance violations and a record number of homeless people in city shelters.

The timing of the grand juries work is key. 2017 is a re-election year for the mayor.