WASHINGTON (CNN) – President Donald Trump is threatening to deploy Immigration and Customs Enforcement agents to the nation’s airports if an agreement is not reached to fund the Department of Homeland Security.

In a Truth Social post Saturday, Trump said the agents would provide security at the airports. He also wrote that the agents would arrest undocumented immigrants.

It is unclear what function the ICE agents would perform since they are not trained in airport security screening.

The Department of Homeland Security was contacted for comment.

Trump’s threat comes amid disruptions at airports as TSA agents continue to work without pay and staffing shortages contribute to delays