Mexico says it is investigating officials in a town where a sign was posted thanking a drug lord for holiday season gifts for children.

A Mexican mayor is under investigation for possible criminal links after public thanks were offered to a notorious cartel leader for giving gifts to children, President Claudia Sheinbaum said Monday.

Mexico’s president said Monday that prosecutors are investigating officials in a town where a sign was posted thanking a drug lord for holiday season gifts for children. In the past, drug cartels in Mexico have often handed out gifts or bags of food to local people around the holidays,

The app, which was announced by Mexico Foreign Secretary Juan Ramón de la Fuente, will go live before U.S. President-elect Donald Trump moves back into the White House later this month. During his election campaign, the former President vowed to carry out mass deportations of Mexican citizens, with his primary target being undocumented residents.