When Dayana Castro heard that the U.S. asylum appointment she waited over a year for was canceled in an instant, she had no doubt: She was heading north any way she could. The 25-year-old migrant, her husband and their 4- and 7-year-old children had nothing left at home in Venezuela.

Mexico's president said on Wednesday she has not agreed to accept non-Mexican migrants seeking asylum in the United States, a day after her new U.S. counterpart announced the return of a program to do so.

Thousands of migrants are now in limbo at the U.S.-Mexico border after President Trump shut down the main legal channel for asylum seekers to enter the country. Many had waited months for immigration appointments,