Three coolers believed to contain horsemeat were found Wednesday in Miami-Dade County, Fla., according to MiamiHerald.com. The U.S. Department of Agriculture will conduct an investigation to confirm the source of the meat.

Officers discovered the coolers inside a blood-spattered van located in the C-9 Basin area of Miami, a part of the city known for its black market horsemeat sales. Horsemeat can sell for as much as $20 per pound.

The discovery comes less than two weeks after Florida governor Charlie Crist signed a bill prohibiting the killing or mutilation of any horse, as well as prohibiting the distribution, sale, or purchase of horsemeat for human consumption. The measure, which goes into effect on July 1, carries a felony offense, including one year of prison time and a $3,500 fine.

More than 20 horses have been butchered in the area since 2009.