Immigration and Customs Enforcement (ICE) officials have signed off on a plan to separate families who are caught crossing the U.S.-Mexico border illegally, officials close to discussions on the proposal told The New York Times.

Homeland Security Secretary Kirstjen Nielsen Kirstjen Michele NielsenMore than million in DHS contracts awarded to firm of acting secretary's wife: report DHS IG won't investigate after watchdog said Wolf, Cuccinelli appointments violated law Appeals court sides with Trump over drawdown of immigrant protections MORE has final approval power, however, and officials told the newspaper that she has yet to sign off on the plan. The White House favors the proposed policy, the newspaper reported.

Rumors have been circulating for months that the Trump administration may implement such a plan. President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE has made cracking down on illegal immigration a priority and vowed tougher measures to deter illegal border crossings.

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Under the policy being considered, families could be separated, with parents being kept in detention facilities as they await deportation while children would be kept under protective custody at shelters for juveniles or with an approved sponsor.

The measure is among those being considered by Trump administration officials to curb illegal border crossings, especially those involving young children.

Former Homeland Security Secretary John Kelly John Francis KellyMORE, who now serves as White House chief of staff, said earlier this year that the Homeland Security Department was considering the policy as a means to discourage whole families from coming into the U.S. illegally, but later backtracked after backlash.

Kelly told Senate Democrats that his policy wasn't intended to separate mothers from their children.