The Nassau district attorney's office subpoenaed county Board of Elections officials Wednesday requesting campaign finance documents for 10 Nassau GOP clubs over the past decade, according to a copy of the subpoena obtained by Newsday.

The subpoena, signed by Acting District Attorney Madeline Singas, came after Newsday reported Tuesday that eight Nassau GOP clubs violated state election law by not filing campaign finance disclosures with the state Board of Elections since 2006.

A computer analysis of Long Island's 113 Democratic and Republican clubs found the Massapequa South, North Massapequa, Seaford, North Bellmore, Lakeview, Merrick, Roosevelt and Manhasset Republican clubs had not filed disclosures with the state despite contributing nearly $500,000 to local candidates and committees.

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Singas, a Democrat, is running for district attorney against Republican Hempstead Town Supervisor Kate Murray, who campaign finance records show received a total of $23,575 from the Merrick, Seaford and North Bellmore clubs over the past nine years. The latter two clubs are led by former and current Hempstead employees.

Nassau district attorney spokesman Shams Tarek said the office does not comment on subpoenas.

The subpoena calls on Board of Elections record officials to provide by Tuesday "statements of campaign receipts, contributions, transfers and expenditures," dating to January 2005.

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Financial documents were also requested for the Floral Park and Elmont North Republican clubs. Floral Park's club had up until last week not filed its disclosures since 2011.

It's unclear why the Elmont North Republican club, which state records show has filed its disclosures, was included in the request. The club is led by Hempstead Deputy Parks Commissioner Michael Zappolo, who in a phone interview Wednesday said he was unsure why the club was included. The club has donated $14,650 to Murray since 2006.

Nassau Republican Committee attorney John Ryan, who previously said many of the clubs failed to file with the state because their treasurers were older and faced challenges when the state moved to electronic filing in 2006, deferred questions to the Board of Elections. Republican Board of Elections Commissioner Louis G. Savinetti did not return a message left with his office Wednesday.

Also Wednesday, Nassau Democratic chairman Jay Jacobs called on Murray to return the donations she received from the clubs that had not filed their disclosures. Jacobs, in a news release, called on Murray to "return these tainted funds."

Murray's campaign responded by saying "Friends for Kate Murray complies with New York's Election Law."

It also criticized Singas for accepting a $1,000 donation from the De Rosa Foundation for Colon Cancer Research and Prevention, a Manhasset-based nonprofit, in December. Under the Internal Revenue Service code, nonprofits are prohibited from contributing to political causes.

Singas campaign spokesman Isaac Goldberg said: "While we are looking into this matter, Kate Murray continues to search for every way possible" to avoid addressing the donations she received from the political clubs.