A government watchdog group is suing the Trump administration for failing to create records linking immigrant children to their parents while separating them at the border.

In the lawsuit filed Friday against the Department of Homeland Security and DHS 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, Citizens for Responsibility and Ethics in Washington (CREW) accused the administration of violating the Federal Records Act.

The 23-page complaint before the U.S. District Court for the District of Columbia also alleges the administration failed to establish an adequate agency-wide records management program.

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“Indeed, rarely has a records management failure had such catastrophic consequences: DHS ripped thousands of children away from their parents, failed to make and preserve adequate documentation of individuals taken into its custody, and, consequently, has been unable to reunify each of the families it separated,” CREW argues in the filing.

The lawsuit comes after the Washington Post reported earlier this month that President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE is considering a new separation policy.

“The Trump Administration’s haphazard implementation of the Zero Tolerance Policy paired with DHS’s failure to meet basic record-keeping requirements mandated by federal law has had catastrophic consequences on the lives of thousands of immigrants seeking entry to our country, even threatening the permanent separation of children from their parents,” CREW Executive Director Noah Bookbinder said in a statement.

“Rarely, if ever, has an agency’s violation of its statutory record keeping obligations had such grave implications. With the administration considering reinstating a new form of their failed policy, it is crucial that they be compelled to follow the law, which makes this lawsuit even more urgent.”

DHS declined to comment.