Police in an Interpol-led operation have arrested 26 people across several countries accused of involvement in migrant-smuggling — and the international police agency wants the public's help to find suspects still at large.

European police authorities say organized crime networks are playing a big role in Europe's migrant crisis, earning up to $6 billion in revenue last year by capitalizing on migrants' desperation.

Interpol said in a statement that those arrested in the 24-country operation in May include a Moroccan suspected of selling Belgian identity cards to Syrian migrants, and an Albanian group charging migrants 14,000 euros to travel across the English Channel by boat.

Interpol released appeals Thursday for help finding 11 other people from several countries accused of illegally smuggling Iraqis, Afghans and other migrants.