GOP presumptive nominee Donald Trump said Sunday that he doesn’t want guns to be in classrooms, but that “some teachers” should have guns.

Trump was asked to respond on Fox & Friends to criticism from Democratic presidential frontrunner Hillary Clinton, who said his idea to put guns in classrooms would endanger students.

Trump at first said they were “just words.”

“I don’t want to have guns in classrooms, although in some cases teachers should have guns in classrooms frankly,” Trump said. “Because teachers are — you know — things that are going on in our schools are unbelievable.”

He went on to say that he wasn’t “advocating” guns in classrooms, but said “trained teachers” should be able to have them in classrooms.

Trump spoke at the National Rifle Association last week, calling Democratic presidential frontrunner Hillary Clinton the “most anti-gun candidate” ever. The organization also formally endorsed him at the event.

A spokesperson for Trump’s campaign didn’t immediately return TPM’s request for comment to clarify his statement.