“We’re going to have to do thing that we never did before,” he said during a Yahoo interview.

“Some people are going to be upset about it, but I think that now everybody is feeling that security is going to rule,” Trump said.

“Certain things will be done that we never thought would happen in this country in terms of information and learning about the enemy,” he added. “We’re going to have to do things that were frankly unthinkable a year ago.”

Trump would not rule out warrantless searches in his plans for increased surveillance of the nation’s Muslims, Yahoo reported Thursday.

He also remained open toward registering U.S. Muslims in a database or giving them special identification identifying their faith, the news outlet added.