Twenty-five Canadians have been charged with being part of a scheme to defraud hundreds of seniors across the United States, according to U.S. federal prosecutors.

The conspirators called older adults and posed as their grandchildren in need of bail money after a fake arrest, federal prosecutors said.

A group of 25 Canadians who go by code names like “Muscles,” “Truck,” and “Keanu” have been indicted for a “grandparent scam” that targeted U.S. seniors, according to the U.S. District Attorney’s Office in the District of Vermont.

Dozens of Canadians are facing charges for scamming millions of dollars out of elders in the U.S., according to the office of the acting state attorney for Vermont. The victims span from almost every state in the country.

Federal prosecutors allege those charged claimed a relative, usually a grandchild, needed money for bail after an arrest.

Canadian suspects are charged with bilking American elders of $21 million as part of a "grandparent scam," according to a federal indictment unsealed Tuesday.

Canadians are charged in connection to scam that cost American retirees $21 million over a three-year period, according to authorities.