President Biden on Tuesday issued a blunt message to migrants thinking about crossing the border: “Don’t come.” The president spoke about the crisis at the US-Mexico border in an interview with ABC News — in which host George Stephanopoulos asked, “do you have to say quite clearly, ‘Don’t come’?” “Yes, I can say quite clearly: Don’t come over,” Biden replied. “Don’t leave your town or city or community.” The number unaccompanied of children and teenagers taken into custody by US authorities at the southern border has shot up in recent weeks, amid an increase in migrants attempting to cross into the country. More than 4,000 migrant children were being held by Border Patrol as of Sunday, with at least 3,000 of them staying in custody longer than the 72-hour limit set by a court order, a US official told The Associated Press. An additional 561 kids were taken into custody Monday, twice the recent average, according to another official. When asked if it was a mistake “not to anticipate this surge,” Biden pushed back, noting previous surges under former President Donald Trump.