The Bronx Democratic Party, which helps elect Democratic candidates across the northernmost borough of New York City, has failed to disclose more than $400,000 in campaign contributions over the past four years — an apparent violation of campaign finance law.

A New York Focus review found that the state Democratic Assembly Campaign Committee, chaired by Assemblymember Jeffrey Dinowitz, transferred the funds in over a dozen installments, yet those contributions never appeared on the Bronx party’s paperwork.

It’s unclear what the Bronx Democrats used the money for. The heavily Democratic borough rarely sees competitive general elections, and the county party has not reported large expenses in recent years. Neither the Bronx party nor Assembly campaign committee, nor Bronx party chair Jamaal Bailey, responded to a request for comment.