Trump’s remarks came hours after he defended the use of tear gas by U.S. Customs and Border Protection agents against a crowd of migrants at the San Ysidro border crossing on Sunday. Trump said that three U.S. agents were “very badly hurt” by rocks and stones thrown by migrants during the unrest.

“We’ve just said, look, if they come over here, we’re going to apprehend them and we’re going to close the border,” Trump said Monday night. “That’s not really been done to the extent that I’m doing because I mean it, and I’ll close it for a long time.”

President Trump calls on a reporter Monday as he speaks to members of the media before boarding Marine One on the South Lawn of the White House. (Andrew Harnik/AP)

Earlier Monday, Trump denied that women and children were among those affected by the tear gas. But in his remarks to reporters here, he shifted his response, first claiming that the tear gas was “very safe,” then blaming migrants with children for being in harm’s way and finally questioning whether the children were theirs at all.

“I say, why are they there?” Trump said. “First of all, the tear gas is a very minor form of the tear gas itself. It’s very safe. The ones that were suffering to a certain extent were the people that were putting it out there, but it’s very safe.”

He asked why parents were “running up into an area where they know the tear gas is forming.”

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“In some cases, you know, they’re not the parents,” Trump claimed. “These are people, they call ’em ‘grabbers.’ They grab a child because they think they’ll have a certain status by having a child. You know, you have certain advantages in terms of our crazy laws that, frankly, Congress should be changing.”

Pressed about his use of the term “grabbers” and whether he was suggesting the women photographed with children fleeing the tear gas were not the children’s real mothers, Trump said he was not and acknowledged he did not know the identities of those at the border crossing on Sunday.

“It’s a term that’s used because, as you know, many people, it’s a very violent, horrible thing, that they feel they have an advantage when they’re with a young child, and they call them ‘grabbers.’ . . . I don’t know who was there yesterday,” he said.

U.S. authorities Sunday closed the Southern California border crossing, the busiest port of entry along the U.S.-Mexico border, as hundreds of migrants rushed the fencing hoping to cross onto U.S. soil from Tijuana. The decision to use tear gas sparked broad condemnation from Democrats and others.