A group of teens protested President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE's immigration policies at the United Nations headquarters in Geneva on Monday by standing in cages, Reuters reported.

Th activists, from the U.S. and Mexico, were reportedly demanding that children separated at the border be reunited with their families.

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The young people inside a black metal cage wore shirts saying "#ClassroomsNotCages" at the U.N.’s European headquarters. Protesters carried signs saying “Children should not be locked up. Period.”

The protest comes amid a surge in crossings at the southern border and record levels of apprehensions.

The spike has put the Department of Health and Human Services (HHS) on track to house the largest number of minors in its history, with 13,200 minors in custody as of June 2. The increase has put a strain on the department’s funds.

The Trump administration previously tried to address that issue by instituting a "zero tolerance" policy that resulted in families being separated at the border. It was rolled back after extreme criticism.

Trump has urged Congress to pass a $4.5 billion spending package that includes nearly $2.9 billion for HHS programs that care for unaccompanied minors in the government’s custody.

Democrats have taken issue with the package over funds that are allocated for enforcement efforts.