Washington (CNN) Donald Trump repeatedly evaded questions in an interview with Fox News host Bill O'Reilly about whether he would kill the families of terrorists after suggesting earlier this week that he would do just that.

Trump repeatedly dodged O'Reilly's questions pressing him specifically on whether he would order the killing of suspected terrorists' families, instead saying that "we have to be much tougher than we are."

Trump suggested Wednesday morning on Fox News that as president he would order the killing of terrorists' families.

"You have to take out their families, when you get these terrorists, you have to take out their families. They care about their lives, don't kid yourself. When they say they don't care about their lives, you have to take out their families," Trump said Wednesday.

But pressed to explain himself in a later interview with O'Reilly, Trump suggested the U.S. should "wipe out their homes" and "where they came from."

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