Trump told the NRA convention in Dallas on Friday that a “once very prestigious” London hospital was “like a war zone for horrible stabbing wounds.” He said London has “unbelievably tough gun laws,” adding, “they don’t have guns; they have knives and instead there’s blood all over the floors of this hospital.”

He then stabbed the air several times, pretending to hold a knife, as he uttered, “Knives, knives, knives.”

London political leaders and physicians condemned Trump’s remarks and called any implication that guns would stem a troubling increase in knife violence outlandish.

“To suggest guns are part of the solution is ridiculous,” said surgeon Karim Brohi of the Royal London Hospital in a statement. “Gunshot wounds are at least twice as lethal as knife injuries and more difficult to repair.”