The White House has approved a list of ICE leaders to be replaced by Border Patrol officials in coming days amid disappointment with arrest numbers.

The Trump administration is planning to replace some regional leaders at Immigration and Customs Enforcement with Border Patrol officials in an attempt to intensify its mass deportations effort amid growing frustration with the pace of daily arrests, according to two Homeland Security Department officials, one former DHS official and one federal law enforcement official.

Donald Trump’s top aides have welcomed Border Patrol’s more aggressive tactics to secure arrests, such as rappeling into apartment buildings from Black Hawk helicopters and jumping out of rental trucks in Home Depot parking lots, as they’ve become disappointed with ICE, the officials said.

“The mentality is CBP does what they’re told, and the administration thinks ICE isn’t getting the job done,” one of the DHS officials said. “So CBP will do it.”