While discussing the United States’ trade imbalance with Mexico, presumptive Republican nominee Donald Trump noted a plane flying above and told supporters that it could be a Mexican one and that they are “getting ready to attack.”

Trump, who was appearing in Manchester, N.H., to talk about trade, made the remark after ticking off the trade imbalances the U.S. has with various nations, including China and Japan, before launching into how Mexico and its leaders are doing a number on the U.S.’s leaders.