Rutkowski's bomb weakened the building's foundation and sprayed glass over the surrounding homes. Using his stolen car that was made up to look like a police vehicle Rutkowski then sped away to the site of his next target. Less than 30 minutes later another bomb exploded, this time at the East Side branch of the First Wisconsin National Bank at the corner of N. Farwell and E. North Avenue. The dynamite had been placed on the ground at the rear of the building, so much of the force of the explosion went outward, wrecking near-by parked cars.