At least four persons including a woman were killed and eight others injured due to blast at Sheikhupura Road here in Gujranwala on late Saturday night. Building of a private bank, three shops and a house near the scene of blast were razed to ground due to blast. According to SP Saddar Gujranwala, Khurram Shoaib the blast took place at 2.45am near a private cardiology centre due to unknown reasons. One person was killed on the spot while ten others sustained injuries. Two bodies were later recovered from the rubble of the destroyed buildings. The bodies and injured were shifted to District Headquarters Hospital Gujranwala, where one among the injured succumbed to his wounds raising death toll to four, while according to hospital sources condition of two injured people was also serious. Three among the deceased were identified as Shahid, Sohail and Wakeela Bibi. Three shops, building of a private bank and house located near the site of blast were destroyed completely due to the blast while window panes of the cardiology centre and other buildings were also broken due to intensity of the blast. The blast also ruptured the main gas pipeline passing nearby. It took two hours to repair the gas pipeline due to pressure of the gas. SP Saddar said that nature of blast has not been yet known and evidences were being gathered to confirm whether the blast occurred due to gas pressure or it was terror act.