Authorities in New York City have cracked down on an internet gambling ring they say took in nearly a billion dollars in illegal wagers on pro football.

Brooklyn District Attorney Kenneth Thompson announced corruption enterprise and other charges on Thursday against four men from California and New York.

Court papers say the ring took sports bets from thousands of gamblers on various websites. They say bets totaled $927 million for NFL games alone last season.

Prosecutors say ringleader Gordon Mitchnick is from Laverne, California, but ran the operation out of Costa Rica. They say he laundered some of the proceeds by buying 20 houses.

A message left with Mitchnick's attorney hasn't been returned.