Top Oklahoma Republicans are outraged that the Obama administration will begin housing as many as 600 illegal immigrant minors at the Fort Sill Army Base as early as Tuesday — at an estimated cost to taxpayers of $252 per child per day.

“Our nation has an immigration problem and a national security crisis, but I don’t believe the answer is for our military facilities to be transformed into a center that houses, feeds, and cares for illegal immigrants,” Sen. Jim Inhofe, the ranking GOP member of the Senate Armed Services Committee, said in a statement on Friday.

“This only encourages parents to send their children unaccompanied over the border and, with the average-aged child being between 13 and 17, it exposes our military facilities to unknown security concerns.”

Rep. Tom Cole, whose district encompasses Fort Sill, said that he was “astonished and upset that I and others have learned about the administration’s plan from unofficial sources, rather than through a process of official notification.

“The manner in which we have been informed of this decision allows almost no time to protest its implementation, to consider alternative solutions or to prepare for the arrival of hundreds of illegal aliens at a facility that is neither intended nor designed for their use,” he said in a statement. “This is incredibly unfair to the American military.”

The U.S. Department of Homeland Security (DHS) told Inhofe of its plan on Wednesday, Inhofe spokeswoman Donelle Harder told Newsmax.

“The administration has given no official notification, despite the fact that these children could arrive as early as June 10,” she said in a statement. “They alerted Senator Inhofe Wednesday that this would be happening.”

Read More: