On Sunday night, July 10, there was gunfire at the Frisco mine. The miners claimed the guards fired first, the guards accused the miners. The union men eventually sent a box of black powder down the flume into one of the mine buildings. The building exploded, killing one company man and injuring several others. The union miners fired into a remaining structure where the guards had taken shelter. A second company man was killed, and sixty or so guards surrendered. Union men marched their prisoners to the union hall.