Federal prosecutors investigating Mayor Eric Adams of New York and his 2021 campaign have served a new round of grand jury subpoenas in their long-running corruption inquiry, issuing them to Mr. Adams himself, to City Hall and to his election committee, according to four people with knowledge of the matter.

The three subpoenas were served in July and seek an extensive range of materials, including text messages, other communications and documents, two of the people said.

The subpoenas contain similar language and seek information in a number of areas, including travel by the mayor, his aides and others, as well as fund-raising. They appear likely to sweep in information related to some aides to the mayor and people who worked both in City Hall and on Mr. Adams's 2021 campaign, the people said.

The new subpoenas came nearly nine months after the corruption investigation first entered public view, meaningfully altering the city's political landscape. Since then, the mayor has become a political target, with sagging approval ratings and at least three challengers in the 2025 Democratic primary.