305 dogs rescued and 20 people arrested in raids of South Carolina dogfighting kennels, federal prosecutors say

More than 20 people were arrested and more than 300 dogs were rescued as authorities raided dogfighting kennels in South Carolina, federal prosecutors said Monday. Authorities said it's believed to be the largest takedown of a dogfighting operation in the state's history. 

The sting started when state and federal agents interrupted a dogfight in Richland County on Saturday, U.S. Attorney Adair Boroughs said in a statement.

That led agents to serve 23 warrants on Sunday that were known to be places where dogs fight or are trained to fight in Clarendon, Lee, Orangeburg, Richland, Sumter and York counties, investigators said.