A woman carries her son while talking to her husband across the fence separating Mexico and U.S, as photographed from Tijuana, Mexico, March 4, 2017. Picture taken from the Mexican side of the border. REUTERS/Jorge Duenes

MEXICO CITY (Reuters) - Mexico is concerned by a U.S. government proposal to separate migrant mothers and children at the southern U.S. border, the country’s foreign minister said on Tuesday, while recognizing that at this stage it was only a possibility.

Luis Videgaray also said the Mexican government was helping deportees from the United States to retain their U.S. assets.