Migrants deported from the U.S. could be held in Costa Rica for up to six weeks before being sent to their home countries, Costa Rican President Rodrigo Chaves said on Wednesday.

A group of families and children hailing from Uzbekistan, China, Afghanistan, Russia and more countries have climbed down the stairs of an airplane in Costa Rica’s capital, the first flight of deportees from other nations Costa Rica agreed to hold in detention facilities for the Trump administration while it organized the return back to their countries.