The Internal Revenue Service began sharing sensitive taxpayer data this week with immigration authorities searching for undocumented migrants, according to two sources familiar with the matter.

The IRS previously agreed to a data-sharing scheme with the Department of Homeland Security to use some sensitive information to identify illegal immigrants.

The Internal Revenue Service and the White House squabbled over the use of tax data to find suspected undocumented immigrants just hours before Trump administration officials pushed out IRS Commissioner Billy Long on Friday, according to a new report Saturday.