More than 6,000 Haitians and other migrants had been removed from an encampment at Del Rio, Texas,

The options remaining for thousands of Haitian migrants straddling the Mexico-Texas border are narrowing as the United States government was ramping up expulsion flights to Haiti on Tuesday and Mexico began busing some away from the border, the Associated Press reports.

More than 6,000 Haitians and other migrants had been removed from an encampment at Del Rio, Texas, U.S. officials said Monday as they defended a strong response that included immediately expelling migrants to their impoverished Caribbean country and faced criticism for using horse patrols to stop them from entering the town.

That was enough for some Haitian migrants to return to Mexico, while others struggled to decide on which side of the border to take their chances.

Marie Pierre, 43, stood on the Mexican side of the river as night fell with hundreds of other migrants unsure what to do. She said Border Patrol agents had separated her from her 19-year-old son in Texas and she didn’t know if he had been deported or not. She waited for a chance to charge her phone, hoping to get news from her sister and cousin in Florida.

“They told me he was an adult and couldn’t be with us,” she said of the moment they were separated.

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