Mexico has not yet opened up its vaccination campaign to people under 18, so some families are going through the courts to secure vaccines for their children. Now, the president is casting doubts on their motives.

About 250 families in 19 of Mexico’s 32 states have turned to the courts to get vaccines for their children, according to President Andrés Manuel López Obrador.

But he says because many of those injunctions are in just four states, he is asking for an investigation into who is behind them.

"Just yesterday I asked for an investigation into how these are being promoted," he said during his daily press conference Friday.

Mexico approved Pfizer’s vaccine for emergency use in children 12 and older in June, but so far is only vaccinating people 18 and older.

The president suggested that providing vaccines for minors could be big business for pharmaceutical companies.

Many parents, however, are concerned about the safety of their children as in-person classes resume across the country.

So far only a handful of injunctions have been granted, including some for children with severe illnesses, like a 14-year-old boy in Sonora with leukemia.