A powerful blast rocked the Panchvati area of Nashik city Wednesday afternoon, killing at least four persons. The blast occurred inside a three storey building which suffered huge damages. While some people are still believed to be trapped inside the debris, the number of injured is still not clear. The blast was so powerful that glass windows of neighboring buildings were splattered and vehicles that were parked in that area also suffered damage. Nashik’s Police Commissioner Vinod Lokhande has said that according to initial reports, it seems to be a cylinder blast.The fire brigade team is currently on the spot and carrying out relief and rescue operation. A team of Maharashtra Anti Terrorism Squad – ATS has reached the spot for further investigations. State Home Minister R R Patil said that a forensic team is also on the spot to determine the exact cause of the blast.