Some UMW miners scabbed on the IWW strike , and others became informants for the state police .
However , United Mine Workers agents conducted overt actions against the strikers , including participation in vigilante raids against IWW property .
Some United Mine Workers miners scabbed on the IWW strike , and others became informants for the state police .
However , United Mine Workers agents conducted overt actions against the strikers , including participation in vigilante raids against IWW property .